Maryland 市外局番: 301
Note：301 市外局番は Maryland, アメリカ合衆国. 国際番号は 001301 or 001-301、0010301、+1-301、+1+301、+1301、00-1-301、00 1 301.
More About Area Code 301
Area Code 301 is one of the original 86 area codes created by AT&T and the Bell System in 1947. It originally served the entire state of Maryland. In 1997, area code 240 was created as an overlay to area code 301. Currently, the largest city it serves is Germantown, MD, and it overlaps coverage areas with area codes 227 and 240.
Active Phone Number Prefixes
| Prefix | Usage | Primary City | Carrier |
| (301) 200- | Landline | Indian Head | Bandwidth.com Clec |
| (301) 202- | Wireless | Chevy Chase | New Cingular Wireless PCS - DC |
| (301) 203- | Landline | Fort Washington | Verizon Maryland |
| (301) 204- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| (301) 205- | Landline | Edgewater | Verizon Maryland |
| (301) 206- | Landline | Laurel | Verizon Maryland |
| (301) 207- | Wireless | Greenbelt | Usa Mobility Wireless |
| (301) 208- | Landline | Gaithersburg | Verizon Maryland |
| (301) 209- | Landline | Hyattsville | Verizon Maryland |
| (301) 210- | Landline | Beltsville | Verizon Maryland |
| (301) 212- | Landline | Gaithersburg | Verizon Maryland |
| (301) 213- | Wireless | Beltsville | Sprint Spectrum L.p. |
| (301) 214- | Landline | Rockville | Verizon Maryland |
| (301) 215- | Landline | Chevy Chase | Verizon Maryland |
| (301) 216- | Landline | Gaithersburg | Verizon Maryland |
| (301) 217- | Landline | Rockville | Verizon Maryland |
| (301) 218- | Landline | Bowie | Verizon Maryland |
| (301) 219- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| (301) 220- | Landline | Greenbelt | Verizon Maryland |
| (301) 221- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| (301) 222- | Landline | Bethesda | Cavalier Telephone Mid-atlantic |
| (301) 223- | Landline | Williamsport | Verizon Maryland |
| (301) 224- | Wireless | Chevy Chase | Usa Mobility Wireless |
| (301) 225- | Landline | Glenn Dale | Teleport Communications America - DC |
| (301) 226- | Landline | Hyattsville | Verizon Maryland |
| (301) 227- | Landline | Glen Echo | Verizon Maryland |
| (301) 228- | Landline | Frederick | Verizon Maryland |
| (301) 229- | Landline | Glen Echo | Verizon Maryland |
| (301) 230- | Landline | Rockville | Verizon Maryland |
| (301) 231- | Landline | Rockville | Verizon Maryland |
| (301) 232- | Landline | Sandy Spring | Mci Worldcom Communications |
| (301) 233- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 234- | Landline | Fort Washington | Verizon Maryland |
| (301) 235- | Landline | Clinton | Mcimetro Access Transmission Services LLC |
| (301) 236- | Landline | Silver Spring | Verizon Maryland |
| (301) 237- | Wireless | Beltsville | Sprint Spectrum L.p. |
| (301) 238- | Landline | Temple Hills | Verizon Maryland |
| (301) 239- | Wireless | Hyattsville | Verizon Maryland |
| (301) 240- | Landline | Gaithersburg | Verizon Maryland |
| (301) 241- | Landline | Highfield | Verizon Maryland |
| (301) 242- | Landline | Brandywine | Mcimetro Access Transmission Services LLC |
| (301) 243- | Landline | Bethesda | Verizon Maryland |
| (301) 244- | Landline | Rockville | Telcove Operations |
| (301) 245- | Landline | Bittinger | Verizon Maryland |
| (301) 246- | Landline | Nanjemoy | Verizon Maryland |
| (301) 247- | Wireless | Leonardtown | New Cingular Wireless PCS - DC |
| (301) 248- | Landline | Fort Washington | Verizon Maryland |
| (301) 249- | Landline | Bowie | Verizon Maryland |
| (301) 250- | Landline | Rockville | Mci Worldcom Communications |
| (301) 251- | Landline | Rockville | Verizon Maryland |
| (301) 252- | Wireless | Gaithersburg | Sprint Spectrum L.p. |
| (301) 253- | Landline | Damascus | Verizon Maryland |
| (301) 254- | Wireless | Beltsville | Sprint Spectrum L.p. |
| (301) 255- | Landline | Rockville | Verizon Maryland |
| (301) 256- | Landline | Laurel | Mci Worldcom Communications |
| (301) 257- | Wireless | Beltsville | Sprint Spectrum L.p. |
| (301) 258- | Landline | Gaithersburg | Verizon Maryland |
| (301) 259- | Landline | Issue | Verizon Maryland |
| (301) 260- | Landline | Ashton | Verizon Maryland |
| (301) 261- | Landline | Glenn Dale | Verizon Maryland |
| (301) 262- | Landline | Bowie | Verizon Maryland |
| (301) 263- | Landline | Glen Echo | Verizon Maryland |
| (301) 264- | Landline | Mount Savage | Verizon Maryland |
| (301) 265- | Landline | Fort Washington | Verizon Maryland |
| (301) 266- | Wireless | Waldorf | New Cingular Wireless PCS - DC |
| (301) 267- | Wireless | Greenbelt | Sprint Spectrum L.p. |
| (301) 268- | Wireless | Cumberland | Uscoc Of Cumberland DBA United States Cel Md |
| (301) 270- | Landline | Hyattsville | Verizon Maryland |
| (301) 271- | Landline | Thurmont | Verizon Maryland |
| (301) 272- | Landline | Rockville | Mci Worldcom Communications |
| (301) 273- | Landline | Silver Spring | Mci Worldcom Communications |
| (301) 274- | Landline | Hughesville | Verizon Maryland |
| (301) 275- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| (301) 276- | Landline | Hyattsville | Mci Worldcom Communications |
| (301) 277- | Landline | Hyattsville | Verizon Maryland |
| (301) 278- | Landline | Mount Rainier | Mci Worldcom Communications |
| (301) 279- | Landline | Rockville | Verizon Maryland |
| (301) 280- | Landline | Chevy Chase | Verizon Maryland |
| (301) 281- | Landline | Oxon Hill | Mci Worldcom Communications |
| (301) 282- | Landline | Silver Spring | Verizon Maryland |
| (301) 283- | Landline | Bryans Road | Verizon Maryland |
| (301) 284- | Landline | Rockville | Mci Worldcom Communications |
| (301) 285- | Wireless | Silver Spring | Verizon Maryland |
| (301) 286- | Landline | Greenbelt | Verizon Maryland |
| (301) 287- | Landline | Rockville | Mci Worldcom Communications |
| (301) 288- | Landline | Rockville | Mci Worldcom Communications |
| (301) 289- | Landline | College Park | Mci Worldcom Communications |
| (301) 290- | Landline | Mechanicsville | Verizon Maryland |
| (301) 291- | Landline | Mount Rainier | Mci Worldcom Communications |
| (301) 292- | Landline | Fort Washington | Verizon Maryland |
| (301) 293- | Landline | Myersville | Verizon Maryland |
| (301) 294- | Landline | Rockville | Verizon Maryland |
| (301) 295- | Landline | Rockville | Verizon Maryland |
| (301) 296- | Landline | Rockville | Mci Worldcom Communications |
| (301) 297- | Landline | Fort Washington | Verizon Maryland |
| (301) 298- | Landline | Upper Marlboro | Mcimetro Access Transmission Services LLC |
| (301) 299- | Landline | Bethesda | Verizon Maryland |
| (301) 300- | Wireless | Bethesda | Cellco Partnership DBA Verizon Wireless |
| (301) 302- | Landline | Hagerstown | Sprint Spectrum L.p. |
| (301) 303- | Wireless | Greenbelt | Usa Mobility Wireless |
| (301) 304- | Landline | Frederick | Comcast Phone Of Northern Maryland |
| (301) 305- | Wireless | Frederick | Sprint Spectrum L.p. |
| (301) 306- | Landline | Lanham | Verizon Maryland |
| (301) 307- | Landline | College Park | Verizon Maryland |
| (301) 308- | Wireless | Greenbelt | Usa Mobility Wireless |
| (301) 309- | Landline | Rockville | Verizon Maryland |
| (301) 310- | Landline | Columbia | Verizon Maryland |
| (301) 312- | Wireless | Oxon Hill | New Cingular Wireless PCS - DC |
| (301) 313- | Landline | Greenbelt | Verizon Maryland |
| (301) 314- | Landline | Hyattsville | Paetec Communications |
| (301) 315- | Landline | Rockville | Verizon Maryland |
| (301) 316- | Landline | Temple Hills | Verizon Maryland |
| (301) 317- | Landline | Laurel | Verizon Maryland |
| (301) 318- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| (301) 319- | Landline | Rockville | Verizon Maryland |
| (301) 320- | Landline | Glen Echo | Verizon Maryland |
| (301) 321- | Landline | Rockville | Telcove Operations |
| (301) 322- | Landline | Hyattsville | Verizon Maryland |
| (301) 323- | Landline | Laurel | Tw Telecom Of Maryland LLC |
| (301) 324- | Landline | Capitol Heights | Verizon Maryland |
| (301) 325- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 326- | Wireless | Silver Spring | Omnipoint Communications Cap Operations |
| (301) 327- | Landline | Upper Marlboro | Comcast Phone Of Northern Maryland |
| (301) 328- | Landline | Silver Spring | Comcast Phone Of Northern Maryland |
| (301) 329- | Wireless | Greenbelt | Cavalier Telephone Mid-atlantic |
| (301) 330- | Landline | Gaithersburg | Verizon Maryland |
| (301) 331- | Wireless | Hagerstown | New Cingular Wireless PCS - DC |
| (301) 332- | Wireless | Silver Spring | New Cingular Wireless PCS - DC |
| (301) 333- | Landline | Capitol Heights | Verizon Maryland |
| (301) 334- | Landline | Oakland | Verizon Maryland |
| (301) 335- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| (301) 336- | Landline | Capitol Heights | Verizon Maryland |
| (301) 337- | Landline | Gaithersburg | Mci Worldcom Communications |
| (301) 338- | Landline | Cumberland | Idt America Corp |
| (301) 339- | Landline | Rockville | Cavalier Telephone Mid-atlantic |
| (301) 340- | Landline | Rockville | Verizon Maryland |
| (301) 341- | Landline | Hyattsville | Verizon Maryland |
| (301) 342- | Landline | Patuxent River | Verizon Maryland |
| (301) 343- | Wireless | Capitol Heights | Sprint Spectrum L.p. |
| (301) 344- | Landline | Greenbelt | Verizon Maryland |
| (301) 345- | Landline | Greenbelt | Verizon Maryland |
| (301) 346- | Wireless | Silver Spring | New Cingular Wireless PCS - DC |
| (301) 347- | Landline | Chevy Chase | Verizon Maryland |
| (301) 348- | Landline | Kensington | Mci Worldcom Communications |
| (301) 349- | Landline | Poolesville | Verizon Maryland |
| (301) 350- | Landline | Capitol Heights | Verizon Maryland |
| (301) 351- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 352- | Landline | Bowie | Verizon Maryland |
| (301) 353- | Landline | Gaithersburg | Verizon Maryland |
| (301) 354- | Landline | Rockville | Teleport Communications America - DC |
| (301) 355- | Landline | Gaithersburg | Verizon Maryland |
| (301) 356- | Landline | Laurel | Vdl DBA Global Telecom Brokers |
| (301) 357- | Wireless | Mount Rainier | Cellco Partnership DBA Verizon Wireless |
| (301) 358- | Landline | Upper Marlboro | Level 3 Communications |
| (301) 359- | Landline | Westernport | Verizon Maryland |
| (301) 360- | Landline | Frederick | Verizon Maryland |
| (301) 361- | Landline | Laurel | Tw Telecom Of Maryland LLC |
| (301) 362- | Landline | Laurel | Verizon Maryland |
| (301) 363- | Landline | Damascus | Level 3 Communications |
| (301) 364- | Landline | Hyattsville | Mci Worldcom Communications |
| (301) 365- | Landline | Bethesda | Verizon Maryland |
| (301) 366- | Wireless | Gaithersburg | Sprint Spectrum L.p. |
| (301) 367- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 368- | Landline | Damascus | Verizon Maryland |
| (301) 369- | Landline | Laurel | Verizon Maryland |
| (301) 370- | Wireless | Gaithersburg | Sprint Spectrum L.p. |
| (301) 371- | Landline | Middletown | Verizon Maryland |
| (301) 372- | Landline | Brandywine | Verizon Maryland |
| (301) 373- | Landline | Hollywood | Verizon Maryland |
| (301) 374- | Landline | Waldorf | Verizon Maryland |
| (301) 375- | Landline | Bryans Road | Verizon Maryland |
| (301) 376- | Wireless | Laurel | Verizon Maryland |
| (301) 377- | Landline | Laurel | Comcast Phone Of Northern Maryland |
| (301) 378- | Landline | Frederick | Comcast Phone Of Northern Maryland |
| (301) 379- | Wireless | Beltsville | Sprint Spectrum L.p. |
| (301) 380- | Landline | Rockville | Verizon Maryland |
| (301) 382- | Wireless | Rockville | Verizon Maryland |
| (301) 383- | Landline | Glenn Dale | Comcast Phone Of Northern Maryland |
| (301) 384- | Landline | Silver Spring | Verizon Maryland |
| (301) 385- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| (301) 386- | Landline | Hyattsville | Verizon Maryland |
| (301) 387- | Landline | Swanton | Verizon Maryland |
| (301) 388- | Landline | Silver Spring | Verizon Maryland |
| (301) 389- | Landline | Laurel | Tw Telecom Of Maryland LLC |
| (301) 390- | Landline | Bowie | Verizon Maryland |
| (301) 391- | Landline | Damascus | Verizon Maryland |
| (301) 392- | Landline | La Plata | Verizon Maryland |
| (301) 393- | Landline | Hagerstown | Verizon Maryland |
| (301) 394- | Landline | Beltsville | Verizon Maryland |
| (301) 395- | Wireless | Laurel | Cellco Partnership DBA Verizon Wireless |
| (301) 396- | Landline | Waldorf | Verizon Maryland |
| (301) 397- | Wireless | Greenbelt | Verizon Maryland |
| (301) 398- | Landline | Rockville | Verizon Maryland |
| (301) 399- | Wireless | Waldorf | Sprint Spectrum L.p. |
| (301) 400- | Landline | Rockville | Verizon Maryland |
| (301) 401- | Wireless | Frederick | New Cingular Wireless PCS - DC |
| (301) 402- | Landline | Bethesda | Verizon Maryland |
| (301) 403- | Landline | Hyattsville | Verizon Maryland |
| (301) 404- | Wireless | Beltsville | Sprint Spectrum L.p. |
| (301) 405- | Landline | Hyattsville | Paetec Communications |
| (301) 406- | Wireless | Chevy Chase | Usa Mobility Wireless |
| (301) 407- | Landline | Poolesville | Verizon Maryland |
| (301) 408- | Landline | Hyattsville | Verizon Maryland |
| (301) 409- | Wireless | Greenbelt | Usa Mobility Wireless |
| (301) 412- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| (301) 413- | Landline | Rockville | Verizon Maryland |
| (301) 414- | Landline | Damascus | Verizon Maryland |
| (301) 415- | Landline | Silver Spring | Verizon Maryland |
| (301) 416- | Landline | Williamsport | Verizon Maryland |
| (301) 417- | Landline | Gaithersburg | Verizon Maryland |
| (301) 418- | Landline | Frederick | Verizon Maryland |
| (301) 419- | Landline | Beltsville | Verizon Maryland |
| (301) 420- | Landline | Suitland | Verizon Maryland |
| (301) 421- | Landline | Silver Spring | Verizon Maryland |
| (301) 422- | Landline | Hyattsville | Verizon Maryland |
| (301) 423- | Landline | Temple Hills | Verizon Maryland |
| (301) 424- | Landline | Rockville | Verizon Maryland |
| (301) 425- | Wireless | Beltsville | Verizon Maryland |
| (301) 426- | Wireless | Beltsville | Verizon Maryland |
| (301) 427- | Landline | Silver Spring | Verizon Maryland |
| (301) 428- | Landline | Gaithersburg | Verizon Maryland |
| (301) 429- | Landline | Lanham | Verizon Maryland |
| (301) 430- | Landline | Bowie | Verizon Maryland |
| (301) 431- | Landline | Hyattsville | Verizon Maryland |
| (301) 432- | Landline | Keedysville | Verizon Maryland |
| (301) 433- | Landline | Fort Washington | Verizon Maryland |
| (301) 434- | Landline | Hyattsville | Verizon Maryland |
| (301) 435- | Landline | Bethesda | Verizon Maryland |
| (301) 436- | Landline | Hyattsville | Verizon Maryland |
| (301) 437- | Wireless | Beltsville | Sprint Spectrum L.p. |
| (301) 438- | Landline | Rockville | Verizon Maryland |
| (301) 439- | Landline | Hyattsville | Verizon Maryland |
| (301) 440- | Wireless | Capitol Heights | Sprint Spectrum L.p. |
| (301) 441- | Landline | Greenbelt | Verizon Maryland |
| (301) 442- | Wireless | Beltsville | Sprint Spectrum L.p. |
| (301) 443- | Landline | Rockville | Verizon Maryland |
| (301) 444- | Landline | Gaithersburg | Verizon Maryland |
| (301) 445- | Landline | Hyattsville | Verizon Maryland |
| (301) 446- | Landline | Greenbelt | Verizon Maryland |
| (301) 447- | Landline | Emmitsburg | Verizon Maryland |
| (301) 448- | Landline | Silver Spring | Comcast Phone Of Northern Maryland |
| (301) 449- | Landline | Fort Washington | Verizon Maryland |
| (301) 451- | Landline | Bethesda | Verizon Maryland |
| (301) 452- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 453- | Landline | Kitzmiller | Verizon Maryland |
| (301) 454- | Landline | Hyattsville | Verizon Maryland |
| (301) 455- | Wireless | Beltsville | Sprint Spectrum L.p. |
| (301) 456- | Landline | Mount Rainier | Comcast Phone Of Northern Maryland |
| (301) 457- | Landline | Silver Spring | Verizon Maryland |
| (301) 458- | Landline | Mount Rainier | Teleport Communications America - DC |
| (301) 459- | Landline | Lanham | Verizon Maryland |
| (301) 460- | Landline | Rockville | Verizon Maryland |
| (301) 461- | Wireless | Rockville | Cellco Partnership DBA Verizon Wireless |
| (301) 462- | Wireless | Myersville | Sprint Spectrum L.p. |
| (301) 463- | Landline | Lonaconing | Verizon Maryland |
| (301) 464- | Landline | Bowie | Verizon Maryland |
| (301) 465- | Wireless | Myersville | Sprint Spectrum L.p. |
| (301) 466- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 467- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 468- | Landline | Rockville | Verizon Maryland |
| (301) 469- | Landline | Bethesda | Verizon Maryland |
| (301) 470- | Landline | Laurel | Verizon Maryland |
| (301) 471- | Wireless | Frederick | Cellco Partnership DBA Verizon Wireless |
| (301) 472- | Landline | Mechanicsville | Verizon Maryland |
| (301) 473- | Landline | Frederick | Verizon Maryland |
| (301) 474- | Landline | Greenbelt | Verizon Maryland |
| (301) 475- | Landline | Leonardtown | Verizon Maryland |
| (301) 476- | Landline | Silver Spring | Verizon Maryland |
| (301) 477- | Landline | College Park | Comcast Phone Of Northern Maryland |
| (301) 478- | Landline | Oldtown | Verizon Maryland |
| (301) 479- | Landline | College Park | Mci Worldcom Communications |
| (301) 480- | Landline | Bethesda | Verizon Maryland |
| (301) 481- | Wireless | Leonardtown | Cellco Partnership DBA Verizon Wireless |
| (301) 482- | Landline | Damascus | Verizon Maryland |
| (301) 483- | Landline | Laurel | Verizon Maryland |
| (301) 484- | Landline | Oxon Hill | Comcast Phone Of Northern Maryland |
| (301) 485- | Landline | Oxon Hill | Comcast Phone Of Northern Maryland |
| (301) 486- | Landline | Greenbelt | Verizon Maryland |
| (301) 487- | Landline | Myersville | Verizon Maryland |
| (301) 488- | Wireless | Greenbelt | Verizon Maryland |
| (301) 489- | Landline | Greenbelt | Verizon Maryland |
| (301) 490- | Landline | Laurel | Verizon Maryland |
| (301) 491- | Wireless | Hagerstown | Uscoc Of Cumberland DBA United States Cel Md |
| (301) 492- | Landline | Chevy Chase | Verizon Maryland |
| (301) 493- | Landline | Rockville | Verizon Maryland |
| (301) 494- | Landline | Upper Marlboro | Verizon Maryland |
| (301) 495- | Landline | Silver Spring | Verizon Maryland |
| (301) 496- | Landline | Bethesda | Verizon Maryland |
| (301) 497- | Landline | Laurel | Verizon Maryland |
| (301) 498- | Landline | Laurel | Verizon Maryland |
| (301) 499- | Landline | Capitol Heights | Verizon Maryland |
| (301) 500- | Landline | Chevy Chase | Xo Maryland |
| (301) 501- | Wireless | Oakland | New Cingular Wireless PCS - DC |
| (301) 502- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 503- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| (301) 504- | Landline | Silver Spring | Verizon Maryland |
| (301) 505- | Landline | Temple Hills | Verizon Maryland |
| (301) 506- | Wireless | Greenbelt | Usa Mobility Wireless |
| (301) 507- | Landline | Greenbelt | Verizon Maryland |
| (301) 508- | Wireless | Myersville | New Cingular Wireless PCS - DC |
| (301) 509- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 510- | Wireless | Greenbelt | Usa Mobility Wireless |
| (301) 512- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 513- | Landline | Greenbelt | Verizon Maryland |
| (301) 514- | Wireless | Frederick | Cellco Partnership DBA Verizon Wireless |
| (301) 515- | Landline | Gaithersburg | Verizon Maryland |
| (301) 516- | Landline | Suitland | Verizon Maryland |
| (301) 517- | Landline | Rockville | Verizon Maryland |
| (301) 518- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 519- | Landline | Gaithersburg | Verizon Maryland |
| (301) 520- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 521- | Landline | Oxon Hill | Verizon Maryland |
| (301) 522- | Wireless | Rockville | Verizon Maryland |
| (301) 523- | Wireless | Beltsville | Sprint Spectrum L.p. |
| (301) 524- | Wireless | Frederick | Sprint Spectrum L.p. |
| (301) 525- | Landline | Gaithersburg | Quantum Telecommunications |
| (301) 526- | Wireless | Silver Spring | New Cingular Wireless PCS - DC |
| (301) 527- | Landline | Gaithersburg | Verizon Maryland |
| (301) 528- | Landline | Gaithersburg | Verizon Maryland |
| (301) 529- | Wireless | Rockville | New Cingular Wireless PCS - DC |
| (301) 530- | Landline | Rockville | Verizon Maryland |
| (301) 531- | Landline | Hyattsville | Starpower Communications |
| (301) 533- | Landline | Oakland | Verizon Maryland |
| (301) 534- | Landline | Indian Head | Ymax Communications Corp. |
| (301) 535- | Wireless | Waldorf | New Cingular Wireless PCS - DC |
| (301) 536- | Wireless | Leonardtown | Sprint Spectrum L.p. |
| (301) 537- | Wireless | Beltsville | Sprint Spectrum L.p. |
| (301) 538- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| (301) 539- | Landline | La Plata | Teleport Communications America - DC |
| (301) 540- | Landline | Gaithersburg | Verizon Maryland |
| (301) 541- | Landline | Mount Rainier | Teleport Communications America - DC |
| (301) 542- | Landline | Waldorf | Teleport Communications America - DC |
| (301) 543- | Landline | Laurel | Teleport Communications America - DC |
| (301) 544- | Wireless | Rockville | Verizon Maryland |
| (301) 545- | Landline | Rockville | Verizon Maryland |
| (301) 546- | Landline | Landover | Verizon Maryland |
| (301) 547- | Landline | Mount Rainier | Teleport Communications America - DC |
| (301) 548- | Landline | Gaithersburg | Verizon Maryland |
| (301) 549- | Landline | Laurel | Verizon Maryland |
| (301) 551- | Landline | Kensington | Baltimore-washington Telephone (bwt) |
| (301) 552- | Landline | Lanham | Verizon Maryland |
| (301) 553- | Wireless | Waldorf | Usa Mobility Wireless |
| (301) 554- | Wireless | Bethesda | Usa Mobility Wireless |
| (301) 556- | Landline | Gaithersburg | Teleport Communications America - DC |
| (301) 557- | Landline | Mount Rainier | Broadwing Communications. LLC |
| (301) 558- | Wireless | College Park | Usa Mobility Wireless |
| (301) 559- | Landline | Hyattsville | Verizon Maryland |
| (301) 560- | Landline | Hyattsville | Paetec Communications |
| (301) 561- | Landline | Silver Spring | Baltimore-washington Telephone (bwt) |
| (301) 562- | Landline | Silver Spring | Verizon Maryland |
| (301) 563- | Landline | Silver Spring | Verizon Maryland |
| (301) 564- | Landline | Rockville | Verizon Maryland |
| (301) 565- | Landline | Silver Spring | Verizon Maryland |
| (301) 566- | Wireless | Beltsville | Verizon Maryland |
| (301) 567- | Landline | Oxon Hill | Verizon Maryland |
| (301) 568- | Landline | Suitland | Verizon Maryland |
| (301) 569- | Wireless | Gaithersburg | Cellco Partnership DBA Verizon Wireless |
| (301) 570- | Landline | Ashton | Verizon Maryland |
| (301) 571- | Landline | Rockville | Verizon Maryland |
| (301) 572- | Landline | Beltsville | Verizon Maryland |
| (301) 573- | Wireless | Hagerstown | Sprint Spectrum L.p. |
| (301) 574- | Landline | Upper Marlboro | Verizon Maryland |
| (301) 575- | Landline | Laurel | Us Lec Of Maryland |
| (301) 576- | Landline | Silver Spring | Paetec Communications |
| (301) 577- | Landline | Lanham | Verizon Maryland |
| (301) 578- | Landline | Silver Spring | Verizon Maryland |
| (301) 579- | Landline | Brandywine | Verizon Maryland |
| (301) 580- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 581- | Landline | Rockville | Verizon Maryland |
| (301) 582- | Landline | Hagerstown | Verizon Maryland |
| (301) 583- | Landline | Hyattsville | Verizon Maryland |
| (301) 584- | Landline | Silver Spring | Baltimore-washington Telephone (bwt) |
| (301) 585- | Landline | Silver Spring | Verizon Maryland |
| (301) 586- | Landline | Beltsville | Verizon Maryland |
| (301) 587- | Landline | Silver Spring | Verizon Maryland |
| (301) 588- | Landline | Silver Spring | Verizon Maryland |
| (301) 589- | Landline | Silver Spring | Verizon Maryland |
| (301) 590- | Landline | Gaithersburg | Verizon Maryland |
| (301) 591- | Landline | Gaithersburg | Paetec Communications |
| (301) 592- | Landline | Silver Spring | Verizon Maryland |
| (301) 593- | Landline | Silver Spring | Verizon Maryland |
| (301) 594- | Landline | Bethesda | Verizon Maryland |
| (301) 595- | Landline | Beltsville | Verizon Maryland |
| (301) 596- | Landline | Columbia | Verizon Maryland |
| (301) 597- | Landline | Hancock | New Frontiers Telecommunications |
| (301) 598- | Landline | Rockville | Verizon Maryland |
| (301) 599- | Landline | Clinton | Verizon Maryland |
| (301) 600- | Landline | Frederick | Verizon Maryland |
| (301) 601- | Landline | Gaithersburg | Verizon Maryland |
| (301) 602- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 603- | Landline | Rockville | Verizon Maryland |
| (301) 604- | Landline | Laurel | Verizon Maryland |
| (301) 605- | Landline | Rockville | Verizon Maryland |
| (301) 606- | Wireless | Frederick | Cellco Partnership DBA Verizon Wireless |
| (301) 607- | Landline | New Market | Verizon Maryland |
| (301) 608- | Landline | Silver Spring | Verizon Maryland |
| (301) 609- | Landline | La Plata | Verizon Maryland |
| (301) 610- | Landline | Rockville | Verizon Maryland |
| (301) 612- | Wireless | Sandy Spring | Teleport Communications America |
| (301) 613- | Wireless | Beltsville | Sprint Spectrum L.p. |
| (301) 614- | Landline | Greenbelt | Verizon Maryland |
| (301) 615- | Wireless | Greenbelt | Verizon Maryland |
| (301) 616- | Wireless | Oakland | Uscoc Of Cumberland DBA United States Cel Md |
| (301) 617- | Landline | Laurel | Verizon Maryland |
| (301) 618- | Landline | Hyattsville | Verizon Maryland |
| (301) 619- | Landline | Frederick | Verizon Maryland |
| (301) 620- | Landline | Frederick | Verizon Maryland |
| (301) 621- | Landline | Glenn Dale | Verizon Maryland |
| (301) 622- | Landline | Silver Spring | Verizon Maryland |
| (301) 623- | Landline | Mount Rainier | Teleport Communications America - DC |
| (301) 624- | Landline | Frederick | Verizon Maryland |
| (301) 625- | Landline | Silver Spring | Verizon Maryland |
| (301) 626- | Wireless | Silver Spring | Verizon Maryland |
| (301) 627- | Landline | Upper Marlboro | Verizon Maryland |
| (301) 628- | Landline | Mount Rainier | Teleport Communications America - DC |
| (301) 629- | Wireless | Glenn Dale | Verizon Maryland |
| (301) 630- | Landline | Temple Hills | Verizon Maryland |
| (301) 631- | Landline | Frederick | Verizon Maryland |
| (301) 632- | Landline | Waldorf | Verizon Maryland |
| (301) 633- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| (301) 634- | Landline | Mount Rainier | Teleport Communications America - DC |
| (301) 635- | Landline | Myersville | New Frontiers Telecommunications |
| (301) 636- | Landline | Hyattsville | Verizon Maryland |
| (301) 637- | Landline | Rockville | Level 3 Communications |
| (301) 638- | Landline | Waldorf | Verizon Maryland |
| (301) 639- | Wireless | Frederick | Cellco Partnership DBA Verizon Wireless |
| (301) 640- | Landline | Gaithersburg | Verizon Maryland |
| (301) 641- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 642- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| (301) 643- | Wireless | Waldorf | Cellco Partnership DBA Verizon Wireless |
| (301) 644- | Landline | Frederick | Verizon Maryland |
| (301) 645- | Landline | Waldorf | Verizon Maryland |
| (301) 646- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| (301) 647- | Wireless | Laurel | Verizon Maryland |
| (301) 648- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| (301) 649- | Landline | Silver Spring | Verizon Maryland |
| (301) 650- | Landline | Silver Spring | Verizon Maryland |
| (301) 651- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 652- | Landline | Chevy Chase | Verizon Maryland |
| (301) 653- | Wireless | Waldorf | New Cingular Wireless PCS - DC |
| (301) 654- | Landline | Chevy Chase | Verizon Maryland |
| (301) 655- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| (301) 656- | Landline | Chevy Chase | Verizon Maryland |
| (301) 657- | Landline | Chevy Chase | Verizon Maryland |
| (301) 658- | Landline | Sandy Spring | Teleport Communications America - DC |
| (301) 659- | Wireless | Waldorf | New Cingular Wireless PCS - DC |
| (301) 660- | Wireless | Keedysville | New Cingular Wireless PCS - DC |
| (301) 661- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| (301) 662- | Landline | Frederick | Verizon Maryland |
| (301) 663- | Landline | Frederick | Verizon Maryland |
| (301) 664- | Landline | Chevy Chase | Verizon Maryland |
| (301) 665- | Landline | Hagerstown | Verizon Maryland |
| (301) 666- | Landline | Glenn Dale | Teleport Communications America - DC |
| (301) 667- | Wireless | Myersville | New Cingular Wireless PCS - DC |
| (301) 668- | Landline | Frederick | Verizon Maryland |
| (301) 669- | Landline | Suitland | Verizon Maryland |
| (301) 670- | Landline | Gaithersburg | Verizon Maryland |
| (301) 671- | Landline | Hagerstown | New Frontiers Telecommunications |
| (301) 672- | Wireless | Tall Timbers | Sprint Spectrum L.p. |
| (301) 673- | Landline | Frederick | New Frontiers Telecommunications |
| (301) 674- | Wireless | Bethesda | Sprint Spectrum L.p. |
| (301) 675- | Wireless | Silver Spring | Omnipoint Communications Cap Operations |
| (301) 676- | Wireless | Frederick | New Cingular Wireless PCS - DC |
| (301) 677- | Landline | Glenn Dale | Teleport Communications America - DC |
| (301) 678- | Landline | Hancock | Verizon Maryland |
| (301) 679- | Landline | Mount Rainier | Teleport Communications America - DC |
| (301) 680- | Landline | Silver Spring | Verizon Maryland |
| (301) 681- | Landline | Silver Spring | Verizon Maryland |
| (301) 682- | Landline | Frederick | Verizon Maryland |
| (301) 683- | Landline | Mount Rainier | Teleport Communications America - DC |
| (301) 684- | Landline | Indian Head | Teleport Communications America - DC |
| (301) 685- | Landline | Damascus | Teleport Communications America - DC |
| (301) 686- | Landline | Oxon Hill | Verizon Maryland |
| (301) 687- | Landline | Frostburg | Verizon Maryland |
| (301) 688- | Landline | Laurel | Verizon Maryland |
| (301) 689- | Landline | Frostburg | Verizon Maryland |
| (301) 690- | Landline | Leonardtown | Idt America Corp |
| (301) 691- | Landline | Poolesville | Teleport Communications America - DC |
| (301) 692- | Landline | Mount Rainier | Teleport Communications America - DC |
| (301) 693- | Wireless | Frederick | Omnipoint Communications Cap Operations |
| (301) 694- | Landline | Frederick | Verizon Maryland |
| (301) 695- | Landline | Frederick | Verizon Maryland |
| (301) 696- | Landline | Frederick | Verizon Maryland |
| (301) 697- | Wireless | Cumberland | New Cingular Wireless PCS - DC |
| (301) 698- | Landline | Frederick | Verizon Maryland |
| (301) 699- | Landline | Hyattsville | Verizon Maryland |
| (301) 701- | Wireless | Hyattsville | Verizon Maryland |
| (301) 702- | Landline | Temple Hills | Verizon Maryland |
| (301) 703- | Landline | Mount Airy | Level 3 Communications |
| (301) 704- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 705- | Landline | Waldorf | Verizon Maryland |
| (301) 706- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 707- | Wireless | Cumberland | Uscoc Of Cumberland DBA United States Cel Md |
| (301) 708- | Wireless | Greenbelt | Cavalier Telephone Mid-atlantic |
| (301) 709- | Wireless | Greenbelt | Usa Mobility Wireless |
| (301) 710- | Landline | Waldorf | Level 3 Communications |
| (301) 712- | Landline | Frederick | Mci Worldcom Communications |
| (301) 713- | Landline | Silver Spring | Verizon Maryland |
| (301) 714- | Landline | Hagerstown | Verizon Maryland |
| (301) 715- | Landline | Upper Marlboro | Teleport Communications America - DC |
| (301) 716- | Wireless | Beltsville | Verizon Maryland |
| (301) 717- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 718- | Landline | Chevy Chase | Verizon Maryland |
| (301) 719- | Landline | Mount Rainier | Teleport Communications America - DC |
| (301) 720- | Landline | Brandywine | Teleport Communications America - DC |
| (301) 721- | Landline | Gaithersburg | Verizon Maryland |
| (301) 722- | Landline | Cumberland | Verizon Maryland |
| (301) 723- | Landline | Cumberland | Verizon Maryland |
| (301) 724- | Landline | Cumberland | Verizon Maryland |
| (301) 725- | Landline | Laurel | Verizon Maryland |
| (301) 727- | Landline | Capitol Heights | Baltimore-washington Telephone (bwt) |
| (301) 728- | Wireless | Silver Spring | Omnipoint Communications Cap Operations |
| (301) 729- | Landline | Cumberland | Verizon Maryland |
| (301) 730- | Wireless | Myersville | New Cingular Wireless PCS - DC |
| (301) 731- | Landline | Lanham | Verizon Maryland |
| (301) 732- | Wireless | Greenbelt | Metro PCS |
| (301) 733- | Landline | Hagerstown | Verizon Maryland |
| (301) 734- | Landline | Silver Spring | Verizon Maryland |
| (301) 735- | Landline | Suitland | Verizon Maryland |
| (301) 736- | Landline | Suitland | Verizon Maryland |
| (301) 737- | Landline | Lexington Park | Verizon Maryland |
| (301) 738- | Landline | Rockville | Verizon Maryland |
| (301) 739- | Landline | Hagerstown | Verizon Maryland |
| (301) 740- | Landline | Gaithersburg | Verizon Maryland |
| (301) 741- | Landline | Laurel | Level 3 Communications |
| (301) 742- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| (301) 743- | Landline | Indian Head | Verizon Maryland |
| (301) 744- | Landline | Indian Head | Verizon Maryland |
| (301) 745- | Landline | Hagerstown | Verizon Maryland |
| (301) 746- | Landline | Accident | Verizon Maryland |
| (301) 747- | Landline | Mount Rainier | Teleport Communications America - DC |
| (301) 748- | Wireless | Frederick | Sprint Spectrum L.p. |
| (301) 749- | Landline | Oxon Hill | Verizon Maryland |
| (301) 750- | Landline | Friendsville | Core Communications |
| (301) 751- | Wireless | Waldorf | Cellco Partnership DBA Verizon Wireless |
| (301) 752- | Wireless | Waldorf | Cellco Partnership DBA Verizon Wireless |
| (301) 753- | Landline | Oxon Hill | Verizon Maryland |
| (301) 754- | Landline | Silver Spring | Verizon Maryland |
| (301) 755- | Landline | Silver Spring | Mci Worldcom Communications |
| (301) 756- | Landline | Laurel | Tw Telecom Of Maryland LLC |
| (301) 757- | Landline | Patuxent River | Verizon Maryland |
| (301) 758- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 759- | Landline | Cumberland | Verizon Maryland |
| (301) 760- | Landline | Bethesda | Level 3 Communications |
| (301) 761- | Landline | Kensington | Level 3 Communications |
| (301) 762- | Landline | Rockville | Verizon Maryland |
| (301) 763- | Landline | Suitland | Verizon Maryland |
| (301) 764- | Landline | Waldorf | Verizon Maryland |
| (301) 765- | Landline | Bethesda | Verizon Maryland |
| (301) 766- | Landline | Hagerstown | Verizon Maryland |
| (301) 767- | Landline | Bethesda | Verizon Maryland |
| (301) 768- | Landline | Cabin John | Level 3 Communications |
| (301) 769- | Landline | Avenue | Verizon Maryland |
| (301) 770- | Landline | Rockville | Verizon Maryland |
| (301) 771- | Wireless | Chevy Chase | Verizon Maryland |
| (301) 772- | Landline | Hyattsville | Verizon Maryland |
| (301) 773- | Landline | Hyattsville | Verizon Maryland |
| (301) 774- | Landline | Ashton | Verizon Maryland |
| (301) 775- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 776- | Landline | Laurel | Verizon Maryland |
| (301) 777- | Landline | Cumberland | Verizon Maryland |
| (301) 778- | Landline | Capitol Heights | Mci Worldcom Communications |
| (301) 779- | Landline | Hyattsville | Verizon Maryland |
| (301) 780- | Landline | Upper Marlboro | Verizon Maryland |
| (301) 781- | Landline | Frostburg | New Frontiers Telecommunications |
| (301) 782- | Landline | Brandywine | Verizon Maryland |
| (301) 783- | Landline | Cumberland | New Frontiers Telecommunications |
| (301) 784- | Landline | Cumberland | Verizon Maryland |
| (301) 785- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 786- | Landline | Mccoole | Verizon Maryland |
| (301) 787- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 788- | Wireless | Frederick | Cellco Partnership DBA Verizon Wireless |
| (301) 789- | Landline | Hyattsville | Core Communications - PA |
| (301) 790- | Landline | Hagerstown | Verizon Maryland |
| (301) 791- | Landline | Hagerstown | Verizon Maryland |
| (301) 792- | Wireless | Silver Spring | Omnipoint Communications Cap Operations |
| (301) 793- | Wireless | Silver Spring | Omnipoint Communications Cap Operations |
| (301) 794- | Landline | Lanham | Verizon Maryland |
| (301) 795- | Landline | Hyattsville | Mcimetro Access Transmission Services LLC |
| (301) 796- | Landline | College Park | Verizon Maryland |
| (301) 797- | Landline | Hagerstown | Verizon Maryland |
| (301) 798- | Landline | New Market | Verizon Maryland |
| (301) 799- | Landline | Keedysville | Core Communications |
| (301) 800- | Wireless | Hagerstown | Virginia PCS Alliance, L.c. |
| (301) 801- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 802- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 803- | Landline | Rockville | Verizon Maryland |
| (301) 804- | Landline | Sandy Spring | Mcimetro Access Transmission Services LLC |
| (301) 805- | Landline | Bowie | Verizon Maryland |
| (301) 806- | Wireless | Beltsville | Sprint Spectrum L.p. |
| (301) 807- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 808- | Landline | Capitol Heights | Verizon Maryland |
| (301) 809- | Landline | Bowie | Verizon Maryland |
| (301) 810- | Landline | Monrovia | AT&T Local |
| (301) 812- | Landline | North Beach | Verizon Maryland |
| (301) 813- | Landline | Bethesda | Baltimore-washington Telephone (bwt) |
| (301) 814- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| (301) 815- | Landline | Frederick | Verizon Maryland |
| (301) 816- | Landline | Rockville | Verizon Maryland |
| (301) 817- | Landline | Suitland | Verizon Maryland |
| (301) 818- | Landline | Waldorf | Verizon Maryland |
| (301) 819- | Wireless | Silver Spring | Verizon Maryland |
| (301) 820- | Landline | Gaithersburg | AT&T Local |
| (301) 821- | Landline | Laurel | AT&T Local |
| (301) 822- | Landline | Mount Rainier | AT&T Local |
| (301) 823- | Landline | Mount Rainier | AT&T Local |
| (301) 824- | Landline | Smithsburg | Verizon Maryland |
| (301) 825- | Landline | Rockville | AT&T Local |
| (301) 826- | Landline | Lexington Park | Verizon Maryland |
| (301) 827- | Landline | Bethesda | Verizon Maryland |
| (301) 828- | Landline | Bethesda | AT&T Local |
| (301) 829- | Landline | Mount Airy | Verizon Maryland |
| (301) 830- | Landline | Silver Spring | AT&T Local |
| (301) 831- | Landline | Adamstown | Verizon Maryland |
| (301) 832- | Landline | Mount Rainier | AT&T Local |
| (301) 833- | Landline | Glenn Dale | Teleport Communications America - DC |
| (301) 834- | Landline | Brunswick | Verizon Maryland |
| (301) 836- | Landline | Temple Hills | Verizon Maryland |
| (301) 837- | Landline | Hyattsville | Mcimetro Access Transmission Services LLC |
| (301) 838- | Landline | Rockville | Verizon Maryland |
| (301) 839- | Landline | Oxon Hill | Verizon Maryland |
| (301) 840- | Landline | Gaithersburg | Verizon Maryland |
| (301) 841- | Landline | Hyattsville | Mcimetro Access Transmission Services LLC |
| (301) 842- | Landline | Clear Spring | Verizon Maryland |
| (301) 843- | Landline | Waldorf | Verizon Maryland |
| (301) 844- | Wireless | Mount Rainier | Sprint Spectrum L.p. |
| (301) 845- | Landline | Walkersville | Verizon Maryland |
| (301) 846- | Landline | Frederick | Verizon Maryland |
| (301) 847- | Landline | Beltsville | Verizon Maryland |
| (301) 848- | Wireless | Waldorf | Cellco Partnership DBA Verizon Wireless |
| (301) 849- | Landline | Oakland | New Frontiers Telecommunications |
| (301) 850- | Landline | Glenn Dale | Level 3 Communications |
| (301) 851- | Landline | Hyattsville | Verizon Maryland |
| (301) 852- | Landline | Hyattsville | Verizon Maryland |
| (301) 853- | Landline | Hyattsville | Verizon Maryland |
| (301) 854- | Landline | Columbia | Verizon Maryland |
| (301) 855- | Landline | Upper Marlboro | Verizon Maryland |
| (301) 856- | Landline | Clinton | Verizon Maryland |
| (301) 857- | Landline | Clear Spring | Core Communications |
| (301) 858- | Landline | Glenn Dale | Verizon Maryland |
| (301) 859- | Landline | Oxon Hill | Level 3 Communications |
| (301) 860- | Landline | Bowie | Verizon Maryland |
| (301) 861- | Landline | Waldorf | Level 3 Communications |
| (301) 862- | Landline | Lexington Park | Verizon Maryland |
| (301) 863- | Landline | Lexington Park | Verizon Maryland |
| (301) 864- | Landline | Hyattsville | Verizon Maryland |
| (301) 865- | Landline | New Market | Verizon Maryland |
| (301) 866- | Landline | Lexington Park | Verizon Maryland |
| (301) 867- | Landline | Hyattsville | Mcimetro Access Transmission Services LLC |
| (301) 868- | Landline | Clinton | Verizon Maryland |
| (301) 869- | Landline | Gaithersburg | Verizon Maryland |
| (301) 870- | Landline | Waldorf | Verizon Maryland |
| (301) 871- | Landline | Rockville | Verizon Maryland |
| (301) 872- | Landline | Ridge | Verizon Maryland |
| (301) 873- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 874- | Landline | Adamstown | Verizon Maryland |
| (301) 875- | Landline | Laurel | Cellco Partnership DBA Verizon Wireless |
| (301) 876- | Landline | Cumberland | Level 3 Communications |
| (301) 877- | Landline | Clinton | Verizon Maryland |
| (301) 878- | Landline | Baltimore | Verizon Maryland |
| (301) 879- | Landline | Silver Spring | Verizon Maryland |
| (301) 880- | Landline | Tall Timbers | Level 3 Communications |
| (301) 881- | Landline | Rockville | Verizon Maryland |
| (301) 882- | Landline | New Market | Core Communications |
| (301) 883- | Landline | Hyattsville | Verizon Maryland |
| (301) 884- | Landline | Mechanicsville | Verizon Maryland |
| (301) 885- | Landline | Waldorf | Verizon Maryland |
| (301) 886- | Landline | Laurel | Verizon Maryland |
| (301) 887- | Landline | Hyattsville | Verizon Maryland |
| (301) 888- | Landline | Brandywine | Verizon Maryland |
| (301) 889- | Landline | Glenn Dale | Verizon Maryland |
| (301) 890- | Landline | Beltsville | Verizon Maryland |
| (301) 891- | Landline | Hyattsville | Verizon Maryland |
| (301) 892- | Landline | Hyattsville | Verizon Maryland |
| (301) 893- | Landline | Waldorf | Verizon Maryland |
| (301) 894- | Landline | Temple Hills | Verizon Maryland |
| (301) 895- | Landline | Grantsville | Verizon Maryland |
| (301) 896- | Landline | Rockville | Verizon Maryland |
| (301) 897- | Landline | Rockville | Verizon Maryland |
| (301) 898- | Landline | Walkersville | Verizon Maryland |
| (301) 899- | Landline | Temple Hills | Verizon Maryland |
| (301) 900- | Landline | Frederick | Verizon Maryland |
| (301) 901- | Landline | Greenbelt | Verizon Maryland |
| (301) 902- | Landline | Beltsville | Verizon Maryland |
| (301) 903- | Landline | Gaithersburg | Verizon Maryland |
| (301) 904- | Wireless | Leonardtown | Cellco Partnership DBA Verizon Wireless |
| (301) 905- | Landline | Silver Spring | Verizon Maryland |
| (301) 906- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| (301) 907- | Landline | Chevy Chase | Verizon Maryland |
| (301) 908- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 909- | Landline | Hyattsville | Mcimetro Access Transmission Services LLC |
| (301) 910- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| (301) 912- | Landline | Odenton | Verizon Maryland |
| (301) 913- | Landline | Chevy Chase | Verizon Maryland |
| (301) 914- | Landline | Mc Henry | Mountain Communications DBA Procom |
| (301) 915- | Landline | Bethesda | Starpower Communications |
| (301) 916- | Landline | Poolesville | Verizon Maryland |
| (301) 917- | Landline | Rockville | Starpower Communications |
| (301) 918- | Landline | Lanham | Verizon Maryland |
| (301) 919- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| (301) 920- | Landline | Silver Spring | Starpower Communications |
| (301) 921- | Landline | Gaithersburg | Verizon Maryland |
| (301) 922- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 923- | Wireless | Hyattsville | Verizon Maryland |
| (301) 924- | Landline | Ashton | Verizon Maryland |
| (301) 925- | Landline | Hyattsville | Verizon Maryland |
| (301) 926- | Landline | Gaithersburg | Verizon Maryland |
| (301) 927- | Landline | Hyattsville | Verizon Maryland |
| (301) 928- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 929- | Landline | Kensington | Verizon Maryland |
| (301) 930- | Wireless | Silver Spring | Verizon Maryland |
| (301) 931- | Landline | Beltsville | Verizon Maryland |
| (301) 932- | Landline | La Plata | Verizon Maryland |
| (301) 933- | Landline | Kensington | Verizon Maryland |
| (301) 934- | Landline | La Plata | Verizon Maryland |
| (301) 935- | Landline | Hyattsville | Verizon Maryland |
| (301) 937- | Landline | Beltsville | Verizon Maryland |
| (301) 938- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 939- | Landline | Laurel | Verizon Maryland |
| (301) 940- | Wireless | Silver Spring | Verizon Maryland |
| (301) 941- | Landline | Chevy Chase | Verizon Maryland |
| (301) 942- | Landline | Kensington | Verizon Maryland |
| (301) 943- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 944- | Landline | Gaithersburg | Mcimetro Access Transmission Services LLC |
| (301) 945- | Landline | Hyattsville | Mcimetro Access Transmission Services LLC |
| (301) 946- | Landline | Kensington | Verizon Maryland |
| (301) 947- | Landline | Gaithersburg | Verizon Maryland |
| (301) 948- | Landline | Gaithersburg | Verizon Maryland |
| (301) 949- | Landline | Kensington | Verizon Maryland |
| (301) 951- | Landline | Chevy Chase | Verizon Maryland |
| (301) 952- | Landline | Upper Marlboro | Verizon Maryland |
| (301) 953- | Landline | Laurel | Verizon Maryland |
| (301) 955- | Landline | Hyattsville | Mcimetro Access Transmission Services LLC |
| (301) 956- | Landline | Rockville | Verizon Maryland |
| (301) 957- | Landline | Laurel | Mcimetro Access Transmission Services LLC |
| (301) 960- | Landline | Silver Spring | Mcimetro Access Transmission Services LLC |
| (301) 961- | Landline | Chevy Chase | Verizon Maryland |
| (301) 962- | Landline | Kensington | Verizon Maryland |
| (301) 963- | Landline | Gaithersburg | Verizon Maryland |
| (301) 964- | Wireless | Myersville | New Cingular Wireless PCS - DC |
| (301) 965- | Landline | Hyattsville | Mcimetro Access Transmission Services LLC |
| (301) 966- | Landline | Hyattsville | Mcimetro Access Transmission Services LLC |
| (301) 967- | Landline | Suitland | Verizon Maryland |
| (301) 968- | Landline | Bethesda | Mci Worldcom Communications |
| (301) 969- | Landline | Brunswick | Comcast Phone Of Northern Maryland |
| (301) 970- | Landline | Annapolis | Verizon Maryland |
| (301) 971- | Landline | Oxon Hill | Starpower Communications |
| (301) 972- | Landline | Gaithersburg | Verizon Maryland |
| (301) 973- | Landline | Glenn Dale | Verizon Maryland |
| (301) 974- | Landline | Laurel | Starpower Communications |
| (301) 975- | Landline | Gaithersburg | Verizon Maryland |
| (301) 976- | Unknown | Baltimore-washington Telephone (bwt) | |
| (301) 977- | Landline | Gaithersburg | Verizon Maryland |
| (301) 978- | Landline | Gaithersburg | Verizon Maryland |
| (301) 979- | Landline | Gaithersburg | Verizon Maryland |
| (301) 980- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| (301) 981- | Landline | Mount Rainier | Tw Telecom Of Maryland LLC |
| (301) 982- | Landline | Greenbelt | Verizon Maryland |
| (301) 983- | Landline | Bethesda | Verizon Maryland |
| (301) 984- | Landline | Rockville | Verizon Maryland |
| (301) 985- | Landline | Hyattsville | Verizon Maryland |
| (301) 986- | Landline | Chevy Chase | Verizon Maryland |
| (301) 987- | Landline | Gaithersburg | Verizon Maryland |
| (301) 988- | Wireless | Hagerstown | Uscoc Of Cumberland DBA United States Cel Md |
| (301) 989- | Landline | Silver Spring | Verizon Maryland |
| (301) 990- | Landline | Gaithersburg | Verizon Maryland |
| (301) 991- | Wireless | Hagerstown | Sprint Spectrum L.p. |
| (301) 992- | Wireless | Hagerstown | Sprint Spectrum L.p. |
| (301) 993- | Wireless | Greenbelt | Verizon Maryland |
| (301) 994- | Landline | Valley Lee | Verizon Maryland |
| (301) 995- | Landline | Patuxent River | Verizon Maryland |
| (301) 996- | Wireless | Beltsville | Sprint Spectrum L.p. |
| (301) 997- | Landline | Leonardtown | Verizon Maryland |
| (301) 998- | Landline | Rockville | Verizon Maryland |
このWebサイトには、国コード、市外局番、番号計画の詳細、およびダイヤル方法に関するヒントが記載されています。 これは、世界中のどこにでも電話をかけるための完全なガイドです。 呼び出したい国名を見つけてクリックするだけです。 国コードを使用してその国に電話をかける方法、および市外局番、ISO国コードなどのその他の役立つ情報が表示されます。
