Area Code 240 phone numbers
In Service Since 1997
Primarily serving the state of Maryland • Across 16 counties and 45 zip codes.
Major Cities Served: Washington • Beltsville • Frederick • McLean • Hagerstown
381 landline and 226 wireless prefixes are served by 49 different phone carriers.

Area Code 240 has 607 prefixes

Prefix 1-240-200 County District of Columbia City Washington Carrier Bandwidth.com Clec, Llc - Md
Prefix 1-240-201 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-203 County Washington City Hagerstown Carrier Sprint Spectrum L.p. - Md
Prefix 1-240-204 County Howard City Annapolis Junction Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-205 County Howard City Annapolis Junction Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-206 County District of Columbia City Washington Carrier Xo Maryland, Llc
Prefix 1-240-207 County District of Columbia City Washington Carrier Cavalier East Llc - Md
Prefix 1-240-208 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-209 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-210 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-212 County Frederick City Frederick Carrier Core Communications, Inc. - Md
Prefix 1-240-213 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-214 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-215 County Frederick City Ijamsville Carrier Telcove Operations, Inc. - Md
Prefix 1-240-216 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-217 County Frederick City Frederick Carrier Omnipoint Communications Cap Operations, Llc
Prefix 1-240-218 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-219 County Fairfax City Vienna Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-220 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-221 County Montgomery City Rockville Carrier Verizon Maryland, Inc.
Prefix 1-240-222 County Fairfax City Herndon Carrier Cavalier Telephone Mid-atlantic, Llc - Md
Prefix 1-240-223 County District of Columbia City Washington Carrier Allegiance Telecom, Inc. - Md
Prefix 1-240-224 County Prince Georges City Beltsville Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-225 County Frederick City Frederick Carrier Core Communications, Inc. - Md
Prefix 1-240-228 County Prince Georges City Laurel Carrier Verizon Maryland, Inc.
Prefix 1-240-229 County District of Columbia City Washington Carrier Broadwing Communications. Llc - Md
Prefix 1-240-230 County City Carrier Global Crossing Local Services, Inc.-md
Prefix 1-240-231 County Frederick City Frederick Carrier Core Communications, Inc. - Md
Prefix 1-240-232 County District of Columbia City Washington Carrier Broadwing Communications. Llc - Md
Prefix 1-240-233 County District of Columbia City Washington Carrier Teleport Communications America, Llc - Dc
Prefix 1-240-234 County District of Columbia City Washington Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-235 County Montgomery City Chevy Chase Carrier Paetec Communications, Inc. - Md
Prefix 1-240-236 County Frederick City Frederick Carrier Verizon Maryland, Inc.
Prefix 1-240-237 County District of Columbia City Washington Carrier Teleport Communications America, Llc - Dc
Prefix 1-240-238 County Montgomery City Chevy Chase Carrier Paetec Communications, Inc. - Md
Prefix 1-240-239 County Montgomery City Chevy Chase Carrier Core Communications, Inc. - Md
Prefix 1-240-241 County District of Columbia City Washington Carrier Starpower Communications, Llc - Md
Prefix 1-240-242 County Prince Georges City Lanham Carrier Starpower Communications, Llc - Md
Prefix 1-240-243 County District of Columbia City Washington Carrier Allegiance Telecom, Inc. - Md
Prefix 1-240-244 County District of Columbia City Washington Carrier Starpower Communications, Llc - Md
Prefix 1-240-245 County District of Columbia City Washington Carrier Starpower Communications, Llc - Md
Prefix 1-240-246 County Prince Georges City Lanham Carrier Starpower Communications, Llc - Md
Prefix 1-240-247 County District of Columbia City Washington Carrier Allegiance Telecom, Inc. - Md
Prefix 1-240-248 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-249 County District of Columbia City Washington Carrier Teleport Communications America, Llc - Dc
Prefix 1-240-250 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-251 County Frederick City Frederick Carrier Core Communications, Inc. - Md
Prefix 1-240-252 County Fairfax City McLean Carrier Level 3 Communications, Llc - Md
Prefix 1-240-253 County City Carrier Global Crossing Local Services, Inc.-md
Prefix 1-240-254 County District of Columbia City Washington Carrier Teleport Communications America, Llc - Dc
Prefix 1-240-255 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-256 County District of Columbia City Washington Carrier Teleport Communications America, Llc - Dc
Prefix 1-240-257 County District of Columbia City Washington Carrier Teleport Communications America, Llc - Dc
Prefix 1-240-258 County Fairfax City McLean Carrier Teleport Communications America, Llc - Dc
Prefix 1-240-260 County District of Columbia City Washington Carrier Allegiance Telecom, Inc. - Md
Prefix 1-240-261 County Fairfax City Vienna Carrier Neutral Tandem-maryland, Llc - Md
Prefix 1-240-262 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-263 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-264 County Prince Georges City Beltsville Carrier Verizon Maryland, Inc.
Prefix 1-240-265 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-266 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-267 County Frederick City Frederick Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-268 County District of Columbia City Washington Carrier Allegiance Telecom, Inc. - Md
Prefix 1-240-269 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-270 County District of Columbia City Washington Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-271 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-272 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-273 County District of Columbia City Washington Carrier Broadwing Communications. Llc - Md
Prefix 1-240-274 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-275 County Frederick City Frederick Carrier Core Communications, Inc. - Md
Prefix 1-240-276 County Montgomery City Gaithersburg Carrier Verizon Maryland, Inc.
Prefix 1-240-277 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-278 County Howard City Annapolis Junction Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-279 County Montgomery City Chevy Chase Carrier Core Communications, Inc. - Md
Prefix 1-240-280 County Manassas City City Manassas Carrier Comcast Phone Of Northern Maryland, Inc. - Md
Prefix 1-240-281 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-282 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-283 County Montgomery City Chevy Chase Carrier Paetec Communications, Inc. - Md
Prefix 1-240-284 County Washington City Hagerstown Carrier Level 3 Communications, Llc - Md
Prefix 1-240-285 County Frederick City Frederick Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-286 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-287 County Frederick City Frederick Carrier Core Communications, Inc. - Md
Prefix 1-240-288 County Washington City Hagerstown Carrier Comcast Phone Of Northern Maryland, Inc. - Md
Prefix 1-240-289 County Fairfax City Herndon Carrier Cavalier Telephone Mid-atlantic, Llc - Md
Prefix 1-240-290 County District of Columbia City Washington Carrier Allegiance Telecom, Inc. - Md
Prefix 1-240-291 County Frederick City Monrovia Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-292 County Fairfax City McLean Carrier Verizon Maryland, Inc.
Prefix 1-240-293 County Fairfax City McLean Carrier Starpower Communications, Llc - Md
Prefix 1-240-294 County Manassas City City Manassas Carrier Xo Maryland, Llc
Prefix 1-240-295 County Fairfax City Herndon Carrier Cavalier Telephone Mid-atlantic, Llc - Md
Prefix 1-240-296 County Fairfax City Herndon Carrier Cavalier Telephone Mid-atlantic, Llc - Md
Prefix 1-240-297 County Fairfax City McLean Carrier Level 3 Communications, Llc - Md
Prefix 1-240-298 County District of Columbia City Washington Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-299 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-300 County District of Columbia City Washington Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-302 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-303 County Fairfax City Herndon Carrier Cavalier Telephone Mid-atlantic, Llc - Md
Prefix 1-240-304 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-305 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-306 County District of Columbia City Washington Carrier Allegiance Telecom, Inc. - Md
Prefix 1-240-307 County Washington City Hagerstown Carrier At&t Local
Prefix 1-240-308 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-309 County District of Columbia City Washington Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-310 County Frederick City Monrovia Carrier Uscoc Of Cumberland, Inc. Dba United States Cel Md
Prefix 1-240-312 County Fairfax City Herndon Carrier Cavalier Telephone Mid-atlantic, Llc - Md
Prefix 1-240-313 County Washington City Hagerstown Carrier Verizon Maryland, Inc.
Prefix 1-240-314 County Montgomery City Rockville Carrier Verizon Maryland, Inc.
Prefix 1-240-315 County Frederick City Frederick Carrier Verizon Maryland, Inc.
Prefix 1-240-316 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-317 County District of Columbia City Washington Carrier Starpower Communications, Llc - Md
Prefix 1-240-318 County Manassas City City Manassas Carrier Verizon Maryland, Inc.
Prefix 1-240-319 County Baltimore City City Baltimore Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-320 County District of Columbia City Washington Carrier Cavalier East Llc - Md
Prefix 1-240-321 County Allegany City Cumberland Carrier Uscoc Of Cumberland, Inc. Dba United States Cel Md
Prefix 1-240-322 County Frederick City Frederick Carrier Core Communications, Inc. - Md
Prefix 1-240-323 County Frederick City Frederick Carrier Core Communications, Inc. - Md
Prefix 1-240-324 County Baltimore City City Baltimore Carrier Ymax Communications Corp. - Md
Prefix 1-240-325 County Montgomery City Chevy Chase Carrier Core Communications, Inc. - Md
Prefix 1-240-326 County Fairfax City Herndon Carrier Cavalier Telephone Mid-atlantic, Llc - Md
Prefix 1-240-327 County Montgomery City Chevy Chase Carrier Core Communications, Inc. - Md
Prefix 1-240-328 County Prince Georges City Beltsville Carrier Verizon Maryland, Inc.
Prefix 1-240-329 County Frederick City Frederick Carrier Level 3 Communications, Llc - Md
Prefix 1-240-330 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-331 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-332 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-333 County District of Columbia City Washington Carrier Cavalier East Llc - Md
Prefix 1-240-334 County City Carrier Global Crossing Local Services, Inc.-md
Prefix 1-240-335 County Fairfax City Herndon Carrier Cavalier Telephone Mid-atlantic, Llc - Md
Prefix 1-240-336 County Montgomery City Chevy Chase Carrier Core Communications, Inc. - Md
Prefix 1-240-337 County Fairfax City Vienna Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-338 County Howard City Annapolis Junction Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-339 County District of Columbia City Washington Carrier Cavalier East Llc - Md
Prefix 1-240-340 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-341 County Frederick City Frederick Carrier Mci Worldcom Communications, Inc. - Md
Prefix 1-240-342 County Prince Georges City Lanham Carrier Starpower Communications, Llc - Md
Prefix 1-240-343 County Washington City Hagerstown Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-344 County Frederick City Monrovia Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-345 County Baltimore City City Baltimore Carrier Level 3 Communications, Llc - Md
Prefix 1-240-346 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-347 County Washington City Hagerstown Carrier Bandwidth.com Clec, Llc - Md
Prefix 1-240-348 County Fairfax City McLean Carrier Level 3 Communications, Llc - Md
Prefix 1-240-349 County City Carrier Global Crossing Local Services, Inc.-md
Prefix 1-240-350 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-351 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-352 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-353 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-354 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-355 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-356 County Frederick City Frederick Carrier Level 3 Communications, Llc - Md
Prefix 1-240-357 County Frederick City Frederick Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-358 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-359 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-360 County Prince Georges City Beltsville Carrier Omnipoint Communications Cap Operations, Llc
Prefix 1-240-361 County Fairfax City Herndon Carrier Cavalier Telephone Mid-atlantic, Llc - Md
Prefix 1-240-362 County Allegany City Cumberland Carrier Verizon Maryland, Inc.
Prefix 1-240-363 County Fairfax City Vienna Carrier Global Naps South, Inc. - Md
Prefix 1-240-364 County District of Columbia City Washington Carrier Cavalier East Llc - Md
Prefix 1-240-365 County Fairfax City Vienna Carrier Baltimore-washington Telephone (bwt)
Prefix 1-240-366 County Washington City Hagerstown Carrier At&t Local
Prefix 1-240-367 County Frederick City Frederick Carrier Sprint Spectrum L.p.
Prefix 1-240-368 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-369 County Frederick City Mount Airy Carrier Core Communications, Inc. - Md
Prefix 1-240-370 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-371 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-372 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-373 County Anne Arundel City Odenton Carrier Verizon Maryland, Inc.
Prefix 1-240-374 County City Carrier Global Crossing Local Services, Inc.-md
Prefix 1-240-375 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-376 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-377 County City Carrier Global Crossing Local Services, Inc.-md
Prefix 1-240-378 County Frederick City Frederick Carrier Core Communications, Inc. - Md
Prefix 1-240-379 County Frederick City Frederick Carrier Verizon Maryland, Inc.
Prefix 1-240-380 County District of Columbia City Washington Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-381 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-382 County Washington City Hagerstown Carrier Teleport Communications America, Llc - Md
Prefix 1-240-383 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-384 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-385 County Frederick City Frederick Carrier Verizon Maryland, Inc.
Prefix 1-240-386 County Montgomery City Gaithersburg Carrier Verizon Maryland, Inc.
Prefix 1-240-387 County District of Columbia City Washington Carrier Cavalier East Llc - Md
Prefix 1-240-388 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-389 County District of Columbia City Washington Carrier Atx Telecommunications Services, Ltd
Prefix 1-240-390 County Fairfax City Herndon Carrier Cavalier Telephone Mid-atlantic, Llc - Md
Prefix 1-240-391 County City Carrier Global Crossing Local Services, Inc.-md
Prefix 1-240-392 County Fairfax City McLean Carrier Starpower Communications, Llc - Md
Prefix 1-240-393 County Prince Georges City Beltsville Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-394 County Washington City Hagerstown Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-395 County Fairfax City Herndon Carrier Cavalier Telephone Mid-atlantic, Llc - Md
Prefix 1-240-396 County City Carrier Global Crossing Local Services, Inc.-md
Prefix 1-240-397 County Frederick City Frederick Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-398 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-399 County District of Columbia City Washington Carrier Xo Maryland, Llc
Prefix 1-240-400 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-401 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-402 County Fairfax City Reston Carrier Mci Worldcom Communications, Inc. - Md
Prefix 1-240-403 County Fairfax City Herndon Carrier Cavalier Telephone Mid-atlantic, Llc - Md
Prefix 1-240-404 County District of Columbia City Washington Carrier Xo Maryland, Llc
Prefix 1-240-405 County Frederick City Frederick Carrier Us Lec Of Maryland, Inc.
Prefix 1-240-406 County District of Columbia City Washington Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-407 County City Carrier Global Crossing Local Services, Inc.-md
Prefix 1-240-408 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-409 County Frederick City Monrovia Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-412 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-413 County Prince Georges City Beltsville Carrier Omnipoint Communications Cap Operations, Llc
Prefix 1-240-414 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-415 County Frederick City Frederick Carrier Ymax Communications Corp. - Md
Prefix 1-240-416 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-417 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-418 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-419 County District of Columbia City Washington Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-420 County Washington City Hagerstown Carrier Verizon Maryland, Inc.
Prefix 1-240-421 County Prince Georges City Beltsville Carrier Omnipoint Communications Cap Operations, Llc
Prefix 1-240-422 County Frederick City Frederick Carrier Omnipoint Communications Cap Operations, Llc
Prefix 1-240-423 County Prince Georges City Beltsville Carrier Omnipoint Communications Cap Operations, Llc
Prefix 1-240-424 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-425 County Fairfax City Vienna Carrier Dslnet Communications Va, Inc. - Md
Prefix 1-240-426 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-427 County District of Columbia City Washington Carrier Xo Maryland, Llc
Prefix 1-240-428 County District of Columbia City Washington Carrier Bandwidth.com Clec, Llc - Md
Prefix 1-240-429 County Prince Georges City Hyattsville Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-430 County Fairfax City Herndon Carrier Cavalier Telephone Mid-atlantic, Llc - Md
Prefix 1-240-431 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-432 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-433 County Fairfax City Herndon Carrier Cavalier Telephone Mid-atlantic, Llc - Md
Prefix 1-240-434 County District of Columbia City Washington Carrier Broadwing Communications. Llc - Md
Prefix 1-240-435 County District of Columbia City Washington Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-436 County Frederick City Ijamsville Carrier Telcove Operations, Inc. - Md
Prefix 1-240-437 County Prince Georges City Beltsville Carrier Xo Maryland, Llc
Prefix 1-240-438 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-439 County Frederick City Frederick Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-440 County Frederick City Monrovia Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-441 County Prince Georges City Beltsville Carrier Omnipoint Communications Cap Operations, Llc
Prefix 1-240-442 County Garrett City Oakland Carrier Verizon Maryland, Inc.
Prefix 1-240-444 County Howard City Annapolis Junction Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-445 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-446 County Frederick City Frederick Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-447 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-448 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-449 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-450 County Fairfax City Herndon Carrier Cavalier Telephone Mid-atlantic, Llc - Md
Prefix 1-240-451 County Allegany City Cumberland Carrier Neutral Tandem-maryland, Llc - Md
Prefix 1-240-452 County Washington City Hagerstown Carrier Lumos Networks Inc. - Va
Prefix 1-240-453 County Montgomery City Rockville Carrier Verizon Maryland, Inc.
Prefix 1-240-454 County Montgomery City Chevy Chase Carrier Paetec Communications, Inc. - Md
Prefix 1-240-455 County Loudoun City Sterling Carrier Paetec Communications, Inc. - Md
Prefix 1-240-456 County Prince Georges City Laurel Carrier Verizon Maryland, Inc.
Prefix 1-240-457 County Frederick City Frederick Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-458 County District of Columbia City Washington Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-459 County Howard City Annapolis Junction Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-460 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-461 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-462 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-463 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-464 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-465 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-466 County District of Columbia City Washington Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-467 County Prince Georges City Beltsville Carrier Comcast Phone Of Northern Maryland, Inc. - Md
Prefix 1-240-468 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-469 County Washington City Hagerstown Carrier Sprint Spectrum L.p. - Md
Prefix 1-240-470 County Prince Georges City Beltsville Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-471 County City Carrier Global Crossing Local Services, Inc.-md
Prefix 1-240-472 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-473 County Fairfax City Herndon Carrier Cavalier Telephone Mid-atlantic, Llc - Md
Prefix 1-240-474 County Prince Georges City Beltsville Carrier Baltimore-washington Telephone (bwt)
Prefix 1-240-475 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-476 County Prince Georges City Beltsville Carrier Omnipoint Communications Cap Operations, Llc
Prefix 1-240-477 County Manassas City City Manassas Carrier Lightwave Communications, Llc - Md
Prefix 1-240-478 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-479 County Howard City Annapolis Junction Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-480 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-481 County Prince Georges City Beltsville Carrier Omnipoint Communications Cap Operations, Llc
Prefix 1-240-482 County Fairfax City McLean Carrier Us Lec Of Maryland, Inc.
Prefix 1-240-483 County District of Columbia City Washington Carrier Comcast Phone Of Northern Maryland, Inc. - Md
Prefix 1-240-484 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-485 County Fairfax City McLean Carrier Us Lec Of Maryland, Inc.
Prefix 1-240-486 County Prince Georges City Beltsville Carrier Omnipoint Communications Cap Operations, Llc
Prefix 1-240-487 County Fairfax City McLean Carrier Us Lec Of Maryland, Inc.
Prefix 1-240-488 County Washington City Hagerstown Carrier Shentel Communications, Llc - Md
Prefix 1-240-489 County District of Columbia City Washington Carrier Xo Maryland, Llc
Prefix 1-240-490 County Frederick City Frederick Carrier Omnipoint Communications Cap Operations, Llc
Prefix 1-240-491 County City Carrier Global Crossing Local Services, Inc.-md
Prefix 1-240-492 County Fairfax City McLean Carrier Us Lec Of Maryland, Inc.
Prefix 1-240-493 County Fairfax City McLean Carrier Us Lec Of Maryland, Inc.
Prefix 1-240-494 County District of Columbia City Washington Carrier Cavalier East Llc - Md
Prefix 1-240-495 County Prince Georges City Hyattsville Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-496 County District of Columbia City Washington Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-497 County Montgomery City Chevy Chase Carrier Verizon Maryland, Inc.
Prefix 1-240-498 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-499 County Fairfax City McLean Carrier Us Lec Of Maryland, Inc.
Prefix 1-240-500 County Frederick City Monrovia Carrier Us Lec Of Maryland, Inc.
Prefix 1-240-501 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-502 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-503 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-504 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-505 County Prince Georges City Beltsville Carrier Omnipoint Communications Cap Operations, Llc
Prefix 1-240-506 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-507 County Howard City Annapolis Junction Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-508 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-509 County Baltimore City City Baltimore Carrier Bandwidth.com Clec, Llc - Md
Prefix 1-240-510 County Prince Georges City Beltsville Carrier Xo Maryland, Llc
Prefix 1-240-512 County Baltimore City City Baltimore Carrier Core Communications, Inc. - Md
Prefix 1-240-513 County Washington City Hagerstown Carrier Sprint Spectrum L.p. - Md
Prefix 1-240-514 County Fairfax City McLean Carrier Us Lec Of Maryland, Inc.
Prefix 1-240-515 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-516 County Fairfax City McLean Carrier Us Lec Of Maryland, Inc.
Prefix 1-240-517 County Baltimore City City Baltimore Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-518 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-519 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
Prefix 1-240-520 County Washington City Hagerstown Carrier Sprint Spectrum L.p. - Md
Prefix 1-240-522 County Frederick City Monrovia Carrier Sprint Spectrum L.p.
Prefix 1-240-523 County District of Columbia City Washington Carrier Xo Maryland, Llc
Prefix 1-240-524 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-525 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-526 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-527 County Frederick City Monrovia Carrier Verizon Maryland, Inc.
Prefix 1-240-528 County District of Columbia City Washington Carrier Broadwing Communications. Llc - Md
Prefix 1-240-529 County Frederick City Monrovia Carrier Verizon Maryland, Inc.
Prefix 1-240-530 County Montgomery City Silver Spring Carrier Local Access Llc - Md
Prefix 1-240-531 County District of Columbia City Washington Carrier Telnyx Llc
Prefix 1-240-532 County District of Columbia City Washington Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-533 County District of Columbia City Washington Carrier Teleport Communications America, Llc - Dc
Prefix 1-240-534 County Montgomery City Chevy Chase Carrier Cellco Partnership Dba Verizon Wireless - Md
Prefix 1-240-535 County Prince Georges City Beltsville Carrier New Cingular Wireless Pcs, Llc - Dc
Prefix 1-240-536 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-537 County Allegany City Cumberland Carrier Atlantech Online, Inc. - Md
Prefix 1-240-538 County District of Columbia City Washington Carrier Xo Maryland, Llc
Prefix 1-240-539 County District of Columbia City Washington Carrier Peerless Network Of Maryland, Llc
Prefix 1-240-540 County Baltimore City City Baltimore Carrier Wide Voice, Llc - Md
Prefix 1-240-541 County District of Columbia City Washington Carrier Sprint Spectrum L.p.
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Prefix 1-240-838 County Prince Georges City Beltsville Carrier Omnipoint Communications Cap Operations, Llc
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