Area Code 240 Details

State Maryland
Major City Germantown
Timezone Eastern
Cities Serve Aspen Hill, MD Bethesda, MD Bowie, MD Chillum, MD Clinton, MD College Park, MD Cumberland, MD Fairland, MD Fort Washington, MD Frederick, MD Gaithersburg, MD Germantown, MD Greenbelt, MD Hagerstown, MD Landover, MD Montgomery Village, MD North Bethesda, MD North Laurel, MD North Potomac, MD Olney, MD Oxon Hill-glassmanor, MD Potomac, MD Rockville, MD Silver Spring, MD South Laurel, MD St. Charles, MD Suitland, MD Waldorf, MD Wheaton-glenmont, MD White Oak, MD

Area Code 240 Prefixes

Prefix Primary City Carrier Service Type
(240) 200 Mount Rainier Bandwidth.com Clec Landline
(240) 201 Ridge Peerless Network Of The District Of Columbia, Dc Landline
(240) 203 Hagerstown Sprint Spectrum L.p. Wireless
(240) 204 Bethesda Cellco Partnership DBA Verizon Wireless Wireless
(240) 205 Cabin John New Cingular Wireless PCS - DC Wireless
(240) 206 Glenn Dale Xo Maryland Landline
(240) 207 Damascus Cavalier East LLC Landline
(240) 208 La Plata Peerless Network Of The District Of Columbia, Dc Landline
(240) 209 Indian Head Peerless Network Of The District Of Columbia, Dc Landline
(240) 210 Waldorf New Cingular Wireless PCS - DC Wireless
(240) 212 Oakland Core Communications Landline
(240) 213 Waldorf Peerless Network Of The District Of Columbia, Dc Landline
(240) 214 Mechanicsville Peerless Network Of The District Of Columbia, Dc Landline
(240) 215 Frederick Telcove Operations Landline
(240) 216 Waldorf Sprint Spectrum L.p. Wireless
(240) 217 Hagerstown Omnipoint Communications Cap Operations Wireless
(240) 218 Nanjemoy Peerless Network Of The District Of Columbia, Dc Landline
(240) 220 Poolesville Peerless Network Of Maryland Landline
(240) 221 Rockville Verizon Maryland Landline
(240) 222 Waldorf Cavalier Telephone Mid-atlantic Landline
(240) 223 Mount Rainier Allegiance Telecom Landline
(240) 224 Gaithersburg Cellco Partnership DBA Verizon Wireless Wireless
(240) 225 Frederick Core Communications Landline
(240) 228 Laurel Verizon Maryland Landline
(240) 229 Waldorf Broadwing Communications. LLC Landline
(240) 230 Hughesville Global Crossing Local Services-md Landline
(240) 231 Hagerstown Core Communications Landline
(240) 232 Mount Rainier Broadwing Communications. LLC Landline
(240) 233 Newburg Teleport Communications America - DC Landline
(240) 234 Mount Rainier Cellco Partnership DBA Verizon Wireless Wireless
(240) 235 Bethesda Paetec Communications Landline
(240) 236 Frederick Verizon Maryland Landline
(240) 237 Callaway Teleport Communications America - DC Landline
(240) 238 Rockville Paetec Communications Landline
(240) 239 Leonardtown Core Communications Landline
(240) 241 Chevy Chase Starpower Communications Landline
(240) 242 Kensington Starpower Communications Landline
(240) 243 Gaithersburg Allegiance Telecom Landline
(240) 244 Mount Rainier Starpower Communications Landline
(240) 245 Glenn Dale Starpower Communications Landline
(240) 246 Gaithersburg Starpower Communications Landline
(240) 247 Mount Rainier Allegiance Telecom Landline
(240) 248 Ridge Peerless Network Of Maryland Landline
(240) 249 Mechanicsville Teleport Communications America - DC Landline
(240) 250 Brandywine Peerless Network Of Maryland Landline
(240) 251 Highfield Core Communications Landline
(240) 252 Gaithersburg Level 3 Communications Landline
(240) 253 Mount Rainier Global Crossing Local Services-md Landline
(240) 254 Hughesville Teleport Communications America - DC Landline
(240) 255 Poolesville Peerless Network Of Maryland Landline
(240) 256 Leonardtown Teleport Communications America - DC Landline
(240) 257 Nanjemoy Teleport Communications America - DC Landline
(240) 258 Ridge Teleport Communications America - DC Landline
(240) 260 Mount Rainier Allegiance Telecom Landline
(240) 262 Callaway Sprint Spectrum L.p. Wireless
(240) 263 Bethesda Sprint Spectrum L.p. Wireless
(240) 264 Beltsville Verizon Maryland Landline
(240) 265 Bethesda Sprint Spectrum L.p. Wireless
(240) 266 Mount Rainier Peerless Network Of Maryland Landline
(240) 268 Rockville Allegiance Telecom Landline
(240) 269 Mount Rainier Peerless Network Of Maryland Landline
(240) 270 Waldorf Cellco Partnership DBA Verizon Wireless Wireless
(240) 271 Bethesda New Cingular Wireless PCS - DC Wireless
(240) 272 Bethesda Sprint Spectrum L.p. Wireless
(240) 273 Mount Rainier Broadwing Communications. LLC Landline
(240) 274 Bethesda New Cingular Wireless PCS - DC Wireless
(240) 275 Grantsville Core Communications Landline
(240) 276 Rockville Verizon Maryland Landline
(240) 277 Bethesda Sprint Spectrum L.p. Wireless
(240) 278 Laurel Cellco Partnership DBA Verizon Wireless Wireless
(240) 279 Waldorf Core Communications Landline
(240) 280 Laurel Comcast Phone Of Northern Maryland Landline
(240) 281 Bethesda New Cingular Wireless PCS - DC Wireless
(240) 282 Mechanicsville Peerless Network Of Maryland Landline
(240) 283 Kensington Paetec Communications Landline
(240) 284 Frostburg Level 3 Communications Landline
(240) 285 Frederick Cellco Partnership DBA Verizon Wireless Landline
(240) 286 Bethesda Sprint Spectrum L.p. Wireless
(240) 287 Hancock Core Communications Landline
(240) 288 Thurmont Comcast Phone Of Northern Maryland Landline
(240) 289 Oxon Hill Cavalier Telephone Mid-atlantic Landline
(240) 290 Mount Rainier Allegiance Telecom Landline
(240) 291 Hagerstown New Cingular Wireless PCS - DC Wireless
(240) 292 Kensington Verizon Maryland Landline
(240) 293 Mount Rainier Starpower Communications Landline
(240) 294 Laurel Xo Maryland Landline
(240) 295 Laurel Cavalier Telephone Mid-atlantic Landline
(240) 296 Hyattsville Cavalier Telephone Mid-atlantic Landline
(240) 297 College Park Level 3 Communications Landline
(240) 298 Leonardtown Cellco Partnership DBA Verizon Wireless Wireless
(240) 299 Waldorf Sprint Spectrum L.p. Wireless
(240) 300 Waldorf Cellco Partnership DBA Verizon Wireless Wireless
(240) 303 Clinton Cavalier Telephone Mid-atlantic Landline
(240) 304 Mount Rainier Sprint Spectrum L.p. Wireless
(240) 305 Beltsville Sprint Spectrum L.p. Wireless
(240) 306 Gaithersburg Allegiance Telecom Landline
(240) 307 Emmitsburg AT&T Local Landline
(240) 308 Damascus New Cingular Wireless PCS - DC Wireless
(240) 309 Leonardtown Cellco Partnership DBA Verizon Wireless Wireless
(240) 310 Hagerstown Uscoc Of Cumberland DBA United States Cel Md Wireless
(240) 312 Capitol Heights Cavalier Telephone Mid-atlantic Landline
(240) 313 Hagerstown Verizon Maryland Landline
(240) 314 Rockville Verizon Maryland Landline
(240) 315 Frederick Verizon Maryland Landline
(240) 316 Chevy Chase Sprint Spectrum L.p. Wireless
(240) 317 Callaway Starpower Communications Landline
(240) 318 Clinton Verizon Maryland Landline
(240) 319 Columbia Cellco Partnership DBA Verizon Wireless Wireless
(240) 320 Waldorf Cavalier East LLC Landline
(240) 321 Oakland Uscoc Of Cumberland DBA United States Cel Md Wireless
(240) 322 Mccoole Core Communications Landline
(240) 323 Emmitsburg Core Communications Landline
(240) 324 Clarksville Ymax Communications Corp. Landline
(240) 325 Damascus Core Communications Landline
(240) 326 Upper Marlboro Cavalier Telephone Mid-atlantic Landline
(240) 327 Gaithersburg Core Communications Landline
(240) 328 Rockville Verizon Maryland Landline
(240) 329 Hagerstown Level 3 Communications Landline
(240) 330 Cabin John Sprint Spectrum L.p. Wireless
(240) 331 Mount Rainier Peerless Network Of Maryland Landline
(240) 332 Newburg Peerless Network Of Maryland Landline
(240) 333 Mount Rainier Cavalier East LLC Landline
(240) 334 Mount Rainier Global Crossing Local Services-md Landline
(240) 335 Glenn Dale Cavalier Telephone Mid-atlantic Landline
(240) 336 Bethesda Core Communications Landline
(240) 337 Mount Rainier Peerless Network Of Maryland Landline
(240) 338 Silver Spring Cellco Partnership DBA Verizon Wireless Wireless
(240) 339 Upper Marlboro Cavalier East LLC Landline
(240) 340 Bethesda Sprint Spectrum L.p. Wireless
(240) 341 Adamstown Mci Worldcom Communications Landline
(240) 342 Sandy Spring Starpower Communications Landline
(240) 343 Hancock Cellco Partnership DBA Verizon Wireless Wireless
(240) 344 Frederick New Cingular Wireless PCS - DC Wireless
(240) 345 Sandy Spring Level 3 Communications Landline
(240) 346 Waldorf Sprint Spectrum L.p. Wireless
(240) 347 Hagerstown Bandwidth.com Clec Landline
(240) 348 Oxon Hill Level 3 Communications Landline
(240) 349 La Plata Global Crossing Local Services-md Landline
(240) 350 Beltsville Sprint Spectrum L.p. Wireless
(240) 351 Beltsville Sprint Spectrum L.p. Wireless
(240) 352 La Plata Peerless Network Of Maryland Landline
(240) 353 Beltsville Sprint Spectrum L.p. Wireless
(240) 354 Beltsville Sprint Spectrum L.p. Wireless
(240) 355 Beltsville Sprint Spectrum L.p. Wireless
(240) 356 Frederick Level 3 Communications Landline
(240) 357 Frederick Cellco Partnership DBA Verizon Wireless Wireless
(240) 358 Damascus Peerless Network Of Maryland Landline
(240) 359 Indian Head Peerless Network Of Maryland Landline
(240) 360 Laurel Omnipoint Communications Cap Operations Wireless
(240) 361 Gaithersburg Cavalier Telephone Mid-atlantic Landline
(240) 362 Cumberland Verizon Maryland Landline
(240) 363 Kensington Global Naps South Landline
(240) 364 Gaithersburg Cavalier East LLC Landline
(240) 365 Damascus Baltimore-washington Telephone (bwt) Landline
(240) 366 Williamsport AT&T Local Landline
(240) 367 Frederick Sprint Spectrum L.p. Wireless
(240) 368 Waldorf Peerless Network Of Maryland Landline
(240) 369 Mount Airy Core Communications Landline
(240) 370 Bethesda Sprint Spectrum L.p. Wireless
(240) 371 Mount Rainier Peerless Network Of Maryland Landline
(240) 372 Gaithersburg Sprint Spectrum L.p. Wireless
(240) 373 Odenton Verizon Maryland Landline
(240) 374 Laurel Global Crossing Local Services-md Landline
(240) 375 Capitol Heights Sprint Spectrum L.p. Wireless
(240) 376 Hughesville Peerless Network Of Maryland Landline
(240) 377 Indian Head Global Crossing Local Services-md Landline
(240) 378 Cumberland Core Communications Landline
(240) 379 Frederick Verizon Maryland Landline
(240) 380 Cabin John Cellco Partnership DBA Verizon Wireless Wireless
(240) 381 Silver Spring New Cingular Wireless PCS - DC Wireless
(240) 382 Hagerstown Teleport Communications America Landline
(240) 383 Chevy Chase New Cingular Wireless PCS - DC Wireless
(240) 384 Callaway Peerless Network Of Maryland Landline
(240) 385 Myersville Verizon Maryland Landline
(240) 386 Gaithersburg Verizon Maryland Landline
(240) 387 Chevy Chase Cavalier East LLC Landline
(240) 388 Gaithersburg Sprint Spectrum L.p. Wireless
(240) 389 Sandy Spring Atx Telecommunications Services, Ltd Landline
(240) 390 Sandy Spring Cavalier Telephone Mid-atlantic Landline
(240) 391 Mount Rainier Global Crossing Local Services-md Landline
(240) 392 Oxon Hill Starpower Communications Landline
(240) 393 Cabin John Cellco Partnership DBA Verizon Wireless Wireless
(240) 394 Mount Airy New Cingular Wireless PCS - DC Wireless
(240) 395 Bethesda Cavalier Telephone Mid-atlantic Landline
(240) 396 Mount Rainier Global Crossing Local Services-md Landline
(240) 397 Frederick Cellco Partnership DBA Verizon Wireless Wireless
(240) 398 Cabin John Sprint Spectrum L.p. Wireless
(240) 399 Chevy Chase Xo Maryland Landline
(240) 400 Bethesda Sprint Spectrum L.p. Wireless
(240) 401 Rockville New Cingular Wireless PCS - DC Wireless
(240) 402 College Park Mci Worldcom Communications Landline
(240) 403 Rockville Cavalier Telephone Mid-atlantic Landline
(240) 404 Gaithersburg Xo Maryland Landline
(240) 405 Frederick Us Lec Of Maryland Landline
(240) 406 Rockville Leap Wireless Intl DBA Cricket Comm Wireless
(240) 407 Mount Rainier Global Crossing Local Services-md Landline
(240) 408 Rockville Leap Wireless Intl DBA Cricket Comm Wireless
(240) 409 Frederick New Cingular Wireless PCS - DC Wireless
(240) 412 Waldorf Sprint Spectrum L.p. Wireless
(240) 413 Hyattsville Omnipoint Communications Cap Operations Wireless
(240) 414 Mount Rainier Peerless Network Of Maryland Landline
(240) 415 Frederick Ymax Communications Corp. Landline
(240) 416 Waldorf New Cingular Wireless PCS - DC Wireless
(240) 417 Capitol Heights Sprint Spectrum L.p. Wireless
(240) 418 Beltsville Sprint Spectrum L.p. Wireless
(240) 419 Waldorf Cellco Partnership DBA Verizon Wireless Wireless
(240) 420 Hagerstown Verizon Maryland Landline
(240) 421 Rockville Omnipoint Communications Cap Operations Wireless
(240) 422 Frederick Omnipoint Communications Cap Operations Wireless
(240) 423 Silver Spring Omnipoint Communications Cap Operations Wireless
(240) 424 Mount Rainier Sprint Spectrum L.p. Wireless
(240) 425 Cabin John Dslnet Communications Va Landline
(240) 426 Bethesda Sprint Spectrum L.p. Wireless
(240) 427 Waldorf Xo Maryland Landline
(240) 428 Rockville Bandwidth.com Clec Landline
(240) 429 Silver Spring Cellco Partnership DBA Verizon Wireless Wireless
(240) 430 Kensington Cavalier Telephone Mid-atlantic Landline
(240) 431 Tall Timbers Sprint Spectrum L.p. Wireless
(240) 432 Beltsville Sprint Spectrum L.p. Wireless
(240) 433 Silver Spring Cavalier Telephone Mid-atlantic Landline
(240) 434 Leonardtown Broadwing Communications. LLC Landline
(240) 435 Waldorf Cellco Partnership DBA Verizon Wireless Wireless
(240) 436 Ijamsville Telcove Operations Landline
(240) 437 Sandy Spring Xo Maryland Landline
(240) 438 Silver Spring Sprint Spectrum L.p. Wireless
(240) 439 Frederick Cellco Partnership DBA Verizon Wireless Wireless
(240) 440 Frederick Leap Wireless Intl DBA Cricket Comm Wireless
(240) 441 Oxon Hill Omnipoint Communications Cap Operations Wireless
(240) 442 Oakland Verizon Maryland Landline
(240) 444 Laurel Cellco Partnership DBA Verizon Wireless Wireless
(240) 445 Bethesda Sprint Spectrum L.p. Wireless
(240) 446 Frederick Cellco Partnership DBA Verizon Wireless Wireless
(240) 447 Rockville New Cingular Wireless PCS - DC Wireless
(240) 448 Waldorf Sprint Spectrum L.p. Wireless
(240) 449 Gaithersburg New Cingular Wireless PCS - DC Wireless
(240) 450 Silver Spring Cavalier Telephone Mid-atlantic Landline
(240) 452 Hagerstown Lumos Networks Inc. - VA Landline
(240) 453 Rockville Verizon Maryland Landline
(240) 454 Gaithersburg Paetec Communications Wireless
(240) 455 Oxon Hill Paetec Communications Landline
(240) 456 Laurel Verizon Maryland Landline
(240) 457 Frederick Cellco Partnership DBA Verizon Wireless Wireless
(240) 458 Waldorf Cellco Partnership DBA Verizon Wireless Wireless
(240) 459 Laurel Cellco Partnership DBA Verizon Wireless Wireless
(240) 460 Silver Spring New Cingular Wireless PCS - DC Wireless
(240) 461 Silver Spring New Cingular Wireless PCS - DC Wireless
(240) 462 Beltsville Sprint Spectrum L.p. Wireless
(240) 463 Silver Spring New Cingular Wireless PCS - DC Wireless
(240) 464 Chevy Chase Sprint Spectrum L.p. Landline
(240) 465 Mount Rainier Peerless Network Of Maryland Landline
(240) 466 Mechanicsville New Cingular Wireless PCS - DC Wireless
(240) 467 Oxon Hill Comcast Phone Of Northern Maryland Landline
(240) 468 Mount Rainier Sprint Spectrum L.p. Wireless
(240) 469 Hagerstown Sprint Spectrum L.p. Wireless
(240) 470 Laurel Cellco Partnership DBA Verizon Wireless Wireless
(240) 471 Silver Spring Global Crossing Local Services-md Landline
(240) 472 Silver Spring New Cingular Wireless PCS - DC Wireless
(240) 473 College Park Cavalier Telephone Mid-atlantic Landline
(240) 475 Silver Spring New Cingular Wireless PCS - DC Wireless
(240) 476 Silver Spring Omnipoint Communications Cap Operations Wireless
(240) 477 Gaithersburg Lightwave Communications Landline
(240) 478 Cabin John New Cingular Wireless PCS - DC Wireless
(240) 479 Oxon Hill Cellco Partnership DBA Verizon Wireless Wireless
(240) 480 Bethesda Sprint Spectrum L.p. Wireless
(240) 481 Silver Spring Omnipoint Communications Cap Operations Wireless
(240) 482 Cabin John Us Lec Of Maryland Landline
(240) 483 Oxon Hill Comcast Phone Of Northern Maryland Landline
(240) 485 Cabin John Us Lec Of Maryland Landline
(240) 486 Glenn Dale Omnipoint Communications Cap Operations Wireless
(240) 487 Hyattsville Us Lec Of Maryland Landline
(240) 488 Oakland Shentel Communications Landline
(240) 489 Poolesville Xo Maryland Landline
(240) 490 Middletown Omnipoint Communications Cap Operations Wireless
(240) 491 Mount Rainier Global Crossing Local Services-md Landline
(240) 492 Capitol Heights Us Lec Of Maryland Landline
(240) 493 Oxon Hill Us Lec Of Maryland Landline
(240) 494 Mount Rainier Cavalier East LLC Landline
(240) 495 Mount Rainier Cellco Partnership DBA Verizon Wireless Wireless
(240) 497 Chevy Chase Verizon Maryland Landline
(240) 498 Beltsville Sprint Spectrum L.p. Wireless
(240) 499 Cabin John Us Lec Of Maryland Landline
(240) 500 Hagerstown Us Lec Of Maryland Landline
(240) 501 Silver Spring Sprint Spectrum L.p. Wireless
(240) 502 Silver Spring Sprint Spectrum L.p. Wireless
(240) 503 Newburg Peerless Network Of Maryland Landline
(240) 504 Silver Spring Sprint Spectrum L.p. Wireless
(240) 505 Silver Spring Omnipoint Communications Cap Operations Wireless
(240) 506 Rockville New Cingular Wireless PCS - DC Wireless
(240) 507 Cabin John Cellco Partnership DBA Verizon Wireless Wireless
(240) 508 Capitol Heights Sprint Spectrum L.p. Wireless
(240) 509 Crofton Bandwidth.com Clec Landline
(240) 510 Upper Marlboro Xo Maryland Landline
(240) 512 College Park Core Communications Landline
(240) 513 Hagerstown Sprint Spectrum L.p. Wireless
(240) 514 Cabin John Us Lec Of Maryland Landline
(240) 515 Bethesda New Cingular Wireless PCS - DC Wireless
(240) 516 Silver Spring Us Lec Of Maryland Landline
(240) 518 Waldorf Sprint Spectrum L.p. Wireless
(240) 519 Bethesda Sprint Spectrum L.p. Wireless
(240) 520 Hagerstown Sprint Spectrum L.p. Wireless
(240) 522 Cumberland Sprint Spectrum L.p. Wireless
(240) 523 La Plata Xo Maryland Landline
(240) 524 Laurel Peerless Network Of Maryland Landline
(240) 525 Upper Marlboro Peerless Network Of Maryland Landline
(240) 526 Leonardtown Peerless Network Of Maryland Landline
(240) 527 Hagerstown Verizon Maryland Landline
(240) 528 Hughesville Broadwing Communications. LLC Landline
(240) 529 Frederick Verizon Maryland Landline
(240) 530 Waldorf Local Access LLC Landline
(240) 532 Oxon Hill Cellco Partnership DBA Verizon Wireless Wireless
(240) 533 Mount Rainier Teleport Communications America - DC Landline
(240) 535 Silver Spring New Cingular Wireless PCS - DC Wireless
(240) 536 Sandy Spring Peerless Network Of Maryland Landline
(240) 538 Leonardtown Xo Maryland Landline
(240) 539 Mount Rainier Peerless Network Of Maryland Landline
(240) 541 Bethesda Sprint Spectrum L.p. Wireless
(240) 542 College Park Us Lec Of Maryland Landline
(240) 543 Bethesda Sprint Spectrum L.p. Wireless
(240) 544 Glenn Dale Us Lec Of Maryland Landline
(240) 545 Upper Marlboro Us Lec Of Maryland Landline
(240) 546 Clinton Us Lec Of Maryland Landline
(240) 547 Laurel Level 3 Communications Landline
(240) 548 Mount Rainier Allegiance Telecom Landline
(240) 550 Rockville Leap Wireless Intl DBA Cricket Comm Wireless
(240) 551 Rockville Leap Wireless Intl DBA Cricket Comm Wireless
(240) 552 Rockville Leap Wireless Intl DBA Cricket Comm Wireless
(240) 553 Mount Rainier Allegiance Telecom Landline
(240) 554 Laurel Allegiance Telecom Landline
(240) 556 Glenn Dale Paetec Communications Landline
(240) 558 Kensington Cavalier Telephone Mid-atlantic Landline
(240) 559 Sandy Spring Allegiance Telecom Landline
(240) 560 Chevy Chase Xo Maryland Landline
(240) 561 Leonardtown Cellco Partnership DBA Verizon Wireless Wireless
(240) 565 Laurel Omnipoint Communications Cap Operations Wireless
(240) 566 Frederick Verizon Maryland Landline
(240) 567 Rockville Verizon Maryland Landline
(240) 568 Laurel Verizon Maryland Landline
(240) 573 Upper Marlboro Global Crossing Local Services-md Landline
(240) 575 Frederick Level 3 Communications Landline
(240) 577 Leonardtown Cellco Partnership DBA Verizon Wireless Wireless
(240) 578 Frederick Cellco Partnership DBA Verizon Wireless Wireless
(240) 580 Cumberland Sprint Spectrum L.p. Wireless
(240) 581 Laurel Paetec Communications - DC Landline
(240) 582 Hyattsville Verizon Maryland Landline
(240) 583 Beltsville Verizon Maryland Landline
(240) 585 Waldorf Cellco Partnership DBA Verizon Wireless Wireless
(240) 586 Frederick Verizon Maryland Landline
(240) 587 Leonardtown Cellco Partnership DBA Verizon Wireless Wireless
(240) 593 Laurel Omnipoint Communications Cap Operations Wireless
(240) 595 Chevy Chase Cellco Partnership DBA Verizon Wireless Wireless
(240) 597 Gaithersburg Peerless Network Of Maryland Landline
(240) 599 Rockville Broadwing Communications. LLC Landline
(240) 600 Mount Rainier Sprint Spectrum L.p. Wireless
(240) 601 Beltsville Sprint Spectrum L.p. Wireless
(240) 602 Beltsville Sprint Spectrum L.p. Wireless
(240) 603 Beltsville Sprint Spectrum L.p. Wireless
(240) 604 Beltsville Sprint Spectrum L.p. Wireless
(240) 605 Beltsville Sprint Spectrum L.p. Wireless
(240) 606 Beltsville Sprint Spectrum L.p. Wireless
(240) 607 Waldorf Global Crossing Local Services-md Landline
(240) 608 Frederick 365 Wireless Wireless
(240) 612 Mount Rainier Tw Telecom Of Maryland LLC Landline
(240) 613 Hyattsville Us Lec Of Maryland Landline
(240) 614 Rockville Metro PCS Wireless
(240) 615 Hyattsville Metro PCS Wireless
(240) 616 College Park Mci Worldcom Communications Landline
(240) 617 Shentel Communications Unknown
(240) 619 Chevy Chase Mci Worldcom Communications Landline
(240) 620 Rockville Mci Worldcom Communications Landline
(240) 621 Kensington Mci Worldcom Communications Landline
(240) 624 Greenbelt Verizon Maryland Landline
(240) 625 Hagerstown Sprint Spectrum L.p. Wireless
(240) 626 Frederick Sprint Spectrum L.p. Wireless
(240) 627 Mount Rainier Global Crossing Local Services-md Landline
(240) 629 Frederick Verizon Maryland Landline
(240) 630 Mount Rainier Bandwidth.com Clec Landline
(240) 631 Gaithersburg Verizon Maryland Landline
(240) 632 Gaithersburg Verizon Maryland Landline
(240) 638 Mount Rainier Broadwing Communications. LLC Landline
(240) 640 Waldorf Leap Wireless Intl DBA Cricket Comm Wireless
(240) 643 Silver Spring Omnipoint Communications Cap Operations Wireless
(240) 644 Chevy Chase Xo Maryland Landline
(240) 645 Chevy Chase Xo Maryland Landline
(240) 646 Laurel Cavalier East LLC Landline
(240) 650 Cabin John Broadvox-clec - DC Landline
(240) 651 Frederick Halo Wireless Services Wireless
(240) 652 Mechanicsville Xo Maryland Landline
(240) 654 Gaithersburg New Cingular Wireless PCS - DC Wireless
(240) 662 Silver Spring Verizon Maryland Landline
(240) 667 Mount Rainier Global Crossing Local Services-md Landline
(240) 668 Damascus Starpower Communications Landline
(240) 669 Kensington Comcast Phone Of Northern Maryland Landline
(240) 670 Mount Rainier Local Access LLC Landline
(240) 671 Mount Rainier Sprint Spectrum L.p. Wireless
(240) 672 Rockville Cellco Partnership DBA Verizon Wireless Landline
(240) 674 Frederick Sprint Spectrum L.p. Wireless
(240) 675 Myersville New Cingular Wireless PCS - DC Wireless
(240) 676 Silver Spring Cellco Partnership DBA Verizon Wireless Wireless
(240) 678 Silver Spring Cellco Partnership DBA Verizon Wireless Wireless
(240) 682 Waldorf Starpower Communications Landline
(240) 683 Gaithersburg Verizon Maryland Landline
(240) 684 Greenbelt Verizon Maryland Landline
(240) 685 Brandywine Global Crossing Local Services-md Landline
(240) 686 Gaithersburg Verizon Maryland Landline
(240) 687 Silver Spring Cellco Partnership DBA Verizon Wireless Wireless
(240) 688 Silver Spring Cellco Partnership DBA Verizon Wireless Wireless
(240) 691 Mount Rainier Global Crossing Local Services-md Landline
(240) 694 Rockville Verizon Maryland Landline
(240) 695 Temple Hills Verizon Maryland Landline
(240) 696 Hyattsville Level 3 Communications Landline
(240) 699 Adamstown Verizon Maryland Landline
(240) 701 Silver Spring Leap Wireless Intl DBA Cricket Comm Wireless
(240) 704 Mount Rainier Leap Wireless Intl DBA Cricket Comm Wireless
(240) 705 Chevy Chase Leap Wireless Intl DBA Cricket Comm Wireless
(240) 706 Chevy Chase Leap Wireless Intl DBA Cricket Comm Wireless
(240) 707 Hagerstown New Cingular Wireless PCS - DC Wireless
(240) 708 Columbia Level 3 Communications Wireless
(240) 712 Columbia Cellco Partnership DBA Verizon Wireless Wireless
(240) 713 Laurel Peerless Network Of Maryland Landline
(240) 715 Rockville Global Crossing Local Services-md Landline
(240) 716 Mount Rainier Omnipoint Communications Cap Operations Wireless
(240) 718 Callaway Xo Maryland Landline
(240) 720 Gaithersburg Global Crossing Local Services-md Landline
(240) 722 Sandy Spring Global Crossing Local Services-md Landline
(240) 723 Silver Spring Cellco Partnership DBA Verizon Wireless Landline
(240) 724 Mount Rainier Cavalier East LLC Landline
(240) 725 Lexington Park Verizon Maryland Landline
(240) 727 Cumberland New Cingular Wireless PCS - DC Wireless
(240) 731 Rockville New Cingular Wireless PCS - DC Wireless
(240) 734 Hagerstown Bandwidth.com Clec Landline
(240) 737 Mount Rainier Cavalier East LLC Landline
(240) 743 Oxon Hill Local Access LLC Landline
(240) 744 Mount Rainier Broadwing Communications. LLC Landline
(240) 745 Damascus Xo Maryland Landline
(240) 747 Mount Rainier Cavalier East LLC Landline
(240) 750 Gaithersburg New Cingular Wireless PCS - DC Wireless
(240) 751 Gaithersburg Telcove Operations Landline
(240) 752 Bethesda Telcove Operations Landline
(240) 753 Rockville Telcove Operations Landline
(240) 754 Waldorf Level 3 Communications Landline
(240) 755 Laurel Comcast Phone Of Northern Maryland Landline
(240) 757 Mount Rainier Peerless Network Of Maryland Landline
(240) 762 Mount Rainier Cellco Partnership DBA Verizon Wireless Wireless
(240) 764 Chevy Chase Xo Maryland Landline
(240) 765 Chevy Chase Xo Maryland Landline
(240) 766 Chevy Chase Xo Maryland Landline
(240) 767 Capitol Heights Cavalier East LLC Landline
(240) 770 Oxon Hill Comcast Phone Of Northern Maryland Landline
(240) 772 Frederick Cellco Partnership DBA Verizon Wireless Wireless
(240) 773 Rockville Verizon Maryland Landline
(240) 776 La Plata Broadwing Communications. LLC Landline
(240) 777 Rockville Verizon Maryland Landline
(240) 778 Chevy Chase Xo Maryland Landline
(240) 779 Sandy Spring Cavalier East LLC Landline
(240) 780 Gaithersburg Broadwing Communications. LLC Landline
(240) 782 Damascus Global Crossing Local Services-md Landline
(240) 783 Bethesda Mte DBA Mte Paging Network Wireless
(240) 784 Myersville Omnipoint Communications Cap Operations Wireless
(240) 786 Laurel Broadwing Communications. LLC Landline
(240) 787 Brandywine Broadwing Communications. LLC Landline
(240) 788 Oxon Hill Broadwing Communications. LLC Landline
(240) 790 Mount Rainier Broadwing Communications. LLC Landline
(240) 793 Gaithersburg Sprint Spectrum L.p. Wireless
(240) 794 Callaway Broadwing Communications. LLC Landline
(240) 800 Chevy Chase Core Communications Landline
(240) 801 Gaithersburg Cellco Partnership DBA Verizon Wireless Wireless
(240) 802 Bethesda 365 Wireless Wireless
(240) 803 Cumberland New Cingular Wireless PCS - DC Wireless
(240) 804 Newburg Xo Maryland Landline
(240) 812 Poolesville Global Crossing Local Services-md Landline
(240) 813 Gaithersburg Atx Telecommunications Services, Ltd Landline
(240) 818 Smithsburg Verizon Maryland Landline
(240) 821 Silver Spring Lightwave Communications Landline
(240) 823 Brandywine Xo Maryland Landline
(240) 826 Rockville Verizon Maryland Landline
(240) 832 Bethesda Sprint Spectrum L.p. Wireless
(240) 833 Chevy Chase Xo Maryland Landline
(240) 837 Hughesville Xo Maryland Landline
(240) 838 Oxon Hill Omnipoint Communications Cap Operations Wireless
(240) 839 Silver Spring Cellco Partnership DBA Verizon Wireless Wireless
(240) 841 Laurel Allegiance Telecom Landline
(240) 842 Glenn Dale Allegiance Telecom Landline
(240) 843 College Park Allegiance Telecom Landline
(240) 844 Ridge Xo Maryland Landline
(240) 845 Chevy Chase Xo Maryland Landline
(240) 846 Clinton Xo Maryland Landline
(240) 848 Gaithersburg Sprint Spectrum L.p. Wireless
(240) 855 Cabin John Sprint Spectrum L.p. Wireless
(240) 857 Mount Rainier Tw Telecom Of Maryland LLC Landline
(240) 863 Laurel Tw Telecom Of Maryland LLC Landline
(240) 864 Rockville Cavalier East LLC Landline
(240) 865 Baltimore Level 3 Communications Landline
(240) 868 Mount Rainier Cavalier East LLC Landline
(240) 876 Bethesda Sprint Spectrum L.p. Wireless
(240) 880 Chevy Chase Broadwing Communications. LLC Landline
(240) 882 Capitol Heights Sprint Spectrum L.p. Wireless
(240) 883 Sandy Spring Broadwing Communications. LLC Landline
(240) 888 Rockville New Cingular Wireless PCS - DC Wireless
(240) 892 Upper Marlboro Broadwing Communications. LLC Landline
(240) 893 Silver Spring New Cingular Wireless PCS - DC Wireless
(240) 895 Lexington Park Verizon Maryland Landline
(240) 897 Mount Rainier Broadwing Communications. LLC Landline
(240) 898 Mount Rainier Broadwing Communications. LLC Landline
(240) 899 Bethesda Omnipoint Communications Cap Operations Wireless
(240) 901 Centurylink Communications LLC Unknown
(240) 903 Indian Head Comcast Phone Of Northern Maryland Landline
(240) 912 Gaithersburg Us Lec Of Maryland Landline
(240) 920 Cumberland Level 3 Communications Landline
(240) 925 Leonardtown Cellco Partnership DBA Verizon Wireless Wireless
(240) 929 Mount Rainier Cavalier East LLC Landline
(240) 938 Ashton Omnipoint Communications Cap Operations Wireless
(240) 949 Mount Rainier Cavalier East LLC Landline
(240) 964 Cumberland Verizon Maryland Landline
(240) 965 College Park Paetec Communications Landline
(240) 976 Baltimore-washington Telephone (bwt) Unknown
(240) 979 Cumberland Level 3 Communications Landline
(240) 986 Nanjemoy Xo Maryland Landline
(240) 988 Beltsville Sprint Spectrum L.p. Wireless
(240) 993 Indian Head Xo Maryland Landline
(240) 994 Rockville Cellco Partnership DBA Verizon Wireless Wireless
(240) 997 Silver Spring Cellco Partnership DBA Verizon Wireless Wireless