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Area Codes > 240 > Central Office Codes

Exchange Rate Center State Operating Company
240-201 RIDGE MD GLOBAL NAPS SOUTH, INC. - MD
240-205 WSNGTNZN10 MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-206 WSNG236Z14 MD XO MARYLAND, LLC
240-207 DAMASCS236 MD CAVALIER EAST LLC - MD
240-208 LA PLATA MD GLOBAL NAPS SOUTH, INC. - MD
240-209 INDIANHEAD MD GLOBAL NAPS SOUTH, INC. - MD
240-210 WALDORF MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-211 MD
240-212 OAKLAND MD CORE COMMUNICATIONS, INC. - MD
240-213 WALDORF MD GLOBAL NAPS SOUTH, INC. - MD
240-214 MECHANCSVL MD GLOBAL NAPS SOUTH, INC. - MD
240-215 FREDERICK MD TELCOVE OPERATIONS, INC. - MD
240-216 WALDORF MD NEXTEL COMMUNICATIONS, INC.
240-217 HAGERSTOWN MD OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC
240-218 NANJEMOY MD GLOBAL NAPS SOUTH, INC. - MD
240-219 TOMPKINSVL MD GLOBAL NAPS SOUTH, INC. - MD
240-220 POOLESVL MD GLOBAL NAPS SOUTH, INC. - MD
240-221 WSNGTNZN11 MD VERIZON MARYLAND, INC.
240-222 WALDORF MD CAVALIER TELEPHONE MID-ATLANTIC. LLC - MD
240-223 WSHNGTNZN2 MD ALLEGIANCE TELECOM, INC. - MD
240-225 FREDERICK MD CORE COMMUNICATIONS, INC. - MD
240-226 MD
240-227 MD
240-228 WSNG236Z13 MD VERIZON MARYLAND, INC.
240-229 WALDORF MD BROADWING COMMUNICATIONS. LLC - MD
240-230 HUGHESVL MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-231 HAGERSTOWN MD CORE COMMUNICATIONS, INC. - MD
240-232 WSNG236Z14 MD BROADWING COMMUNICATIONS. LLC - MD
240-233 TOMPKINSVL MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
240-234 DAMASCS236 MD ARCH WIRELESS HOLDINGS, INC.
240-235 WSHNGTNZN2 MD PAETEC COMMUNICATIONS, INC. - MD
240-236 FREDERICK MD VERIZON MARYLAND, INC.
240-237 LXTNPKGRML MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
240-238 WSNGTNZN10 MD PAETEC COMMUNICATIONS, INC. - MD
240-239 LEONARDTN MD CORE COMMUNICATIONS, INC. - MD
240-240 MD
240-241 WSNG236Z13 MD STARPOWER COMMUNICATIONS, LLC - MD
240-242 WSNGTNZN11 MD STARPOWER COMMUNICATIONS, LLC - MD
240-243 GAITHERSBG MD ALLEGIANCE TELECOM, INC. - MD
240-244 WSNGTNZN16 MD STARPOWER COMMUNICATIONS, LLC - MD
240-245 WSNG236Z14 MD STARPOWER COMMUNICATIONS, LLC - MD
240-246 GAITHERSBG MD STARPOWER COMMUNICATIONS, LLC - MD
240-247 WSHNGTNZN3 MD ALLEGIANCE TELECOM, INC. - MD
240-248 RIDGE MD GLOBAL NAPS SOUTH, INC. - MD
240-249 MECHANCSVL MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
240-250 BRANDYWINE MD GLOBAL NAPS SOUTH, INC. - MD
240-251 HIGHFIELD MD CORE COMMUNICATIONS, INC. - MD
240-252 GAITHERSBG MD LEVEL 3 COMMUNICATIONS, LLC - MD
240-253 WSHNGTNZN6 MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-254 HUGHESVL MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
240-255 POOLESVL MD GLOBAL NAPS SOUTH, INC. - MD
240-256 LEONARDTN MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
240-257 NANJEMOY MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
240-258 RIDGE MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
240-259 MD
240-260 WSNG236Z14 MD ALLEGIANCE TELECOM, INC. - MD
240-261 WSNGTNZN10 MD GLOBAL NAPS SOUTH, INC. - MD
240-262 DAMASCS236 MD TIDALWAVE TELEPHONE INC.
240-263 DAMASCS236 MD TIDALWAVE TELEPHONE INC.
240-264 LAUREL236 MD VERIZON MARYLAND, INC.
240-265 WSHNGTNZN5 MD TIDALWAVE TELEPHONE INC.
240-266 WSNG236Z14 MD GLOBAL NAPS SOUTH, INC. - MD
240-267 WSHNGTNZN5 MD TIDALWAVE TELEPHONE INC.
240-268 WSNGTNZN10 MD ALLEGIANCE TELECOM, INC. - MD
240-269 WSNGTNZN16 MD GLOBAL NAPS SOUTH, INC. - MD
240-270 WSNG236Z14 MD TIDALWAVE TELEPHONE INC.
240-271 WSHNGTNZN2 MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-272 WSNG236Z14 MD TIDALWAVE TELEPHONE INC.
240-273 WSHNGTNZN6 MD BROADWING COMMUNICATIONS. LLC - MD
240-274 WSHNGTNZN2 MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-275 GRANTSVL MD CORE COMMUNICATIONS, INC. - MD
240-276 WSNGTNZN10 MD VERIZON MARYLAND, INC.
240-277 WSHNGTNZN2 MD SPRINT SPECTRUM L.P.
240-279 WALDORF MD CORE COMMUNICATIONS, INC. - MD
240-280 LAUREL236 MD COMCAST BUSINESS COMMUNICATIONS, INC. - MD
240-281 WSHNGTNZN2 MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-282 MECHANCSVL MD GLOBAL NAPS SOUTH, INC. - MD
240-283 WSNGTNZN11 MD PAETEC COMMUNICATIONS, INC. - MD
240-284 FROSTBURG MD NATIONSLINE, INC.-MD
240-285 FREDERICK MD CAVALIER EAST LLC - MD
240-286 WSHNGTNZN2 MD NEXTEL COMMUNICATIONS, INC.
240-287 HANCOCK MD CORE COMMUNICATIONS, INC. - MD
240-288 THURMONT MD NATIONSLINE, INC.-MD
240-289 WSHNGTNZN6 MD CAVALIER TELEPHONE MID-ATLANTIC. LLC - MD
240-290 WSNGTNZN11 MD ALLEGIANCE TELECOM, INC. - MD
240-291 HAGERSTOWN MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-292 WSNGTNZN11 MD VERIZON MARYLAND, INC.
240-293 WSNGTNZN12 MD STARPOWER COMMUNICATIONS, LLC - MD
240-294 LAUREL236 MD XO MARYLAND, LLC
240-295 LAUREL236 MD CAVALIER TELEPHONE MID-ATLANTIC. LLC - MD
240-296 WSHNGTNZN4 MD CAVALIER TELEPHONE MID-ATLANTIC. LLC - MD
240-297 WSNG236Z13 MD LEVEL 3 COMMUNICATIONS, LLC - MD
240-298 LEONARDTN MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-299 WALDORF MD NEXTEL COMMUNICATIONS, INC.
240-301 MD
240-303 WSNGTNZN16 MD CAVALIER TELEPHONE MID-ATLANTIC. LLC - MD
240-304 WSHNGTNZN5 MD NEXTEL COMMUNICATIONS, INC.
240-305 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
240-306 GAITHERSBG MD ALLEGIANCE TELECOM, INC. - MD
240-307 EMMITSBURG MD AT&T LOCAL