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Area Codes > 520 > Central Office Codes

Exchange Rate Center State Operating Company
520-200 HAYDEN AZ MOUNTAIN TELECOMMUNICATIONS, INC. - CLEC
520-201 SAN MANUEL AZ MOUNTAIN TELECOMMUNICATIONS, INC. - CLEC
520-202 TUCSON AZ TIME WARNER TELECOM OF ARIZONA, LLC-AZ
520-203 TUCSON AZ XO ARIZONA, INC.
520-204 TUCSON AZ MCLEODUSA TELECOMMUNICATIONS SERVICES, INC.- AZ
520-205 TUCSON AZ QWEST CORPORATION
520-206 TUCSON AZ QWEST CORPORATION
520-207 TUCSON AZ COX ARIZONA TELCOM, INC. - AZ
520-208 CASAGRANDE AZ GLOBAL CROSSING LOCAL SERVICES, INC.-AZ
520-209 TUCSON AZ QWEST CORPORATION
520-211 AZ
520-212 CASCABEL AZ MIDVALE TELEPHONE EXCHANGE, INC.
520-215 BLACKWATER AZ GILA RIVER TELECOMM, INC.
520-216 NOGALES AZ ALLTEL COMMUNICATIONS OF THE SOUTHWEST, LP - AZ
520-218 TUCSON AZ QWEST CORPORATION
520-219 TUCSON AZ QWEST CORPORATION
520-220 SIERRAVIST AZ T-MOBILE USA, INC.
520-221 BENSON AZ ALLTEL COMMUNICATIONS OF THE SOUTHWEST, LP - AZ
520-223 NOGALES AZ LEVEL 3 COMMUNICATIONS, LLC - AZ
520-224 SIERRAVIST AZ MOUNTAIN TELECOMMUNICATIONS, INC. - CLEC
520-225 TUCSON AZ QWEST CORPORATION
520-226 SIERRAVIST AZ LEVEL 3 COMMUNICATIONS, LLC - AZ
520-227 SIERRAVIST AZ SPRINT SPECTRUM L.P.- AZ
520-228 TUCSON AZ TIME WARNER TELECOM OF ARIZONA, LLC-AZ
520-229 TUCSON AZ QWEST CORPORATION
520-230 TUCSON AZ ALLTEL COMMUNICATIONS OF THE SOUTHWEST, LP - AZ
520-232 TUCSON AZ QWEST CORPORATION
520-233 CASAGRANDE AZ AT&T LOCAL
520-234 SIERRAVIST AZ AT&T LOCAL
520-235 TUCSON AZ ALLTEL COMMUNICATIONS OF THE SOUTHWEST, LP - AZ
520-236 SIERRAVIST AZ SPRINT SPECTRUM L.P.- AZ
520-237 TUCSON AZ CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ
520-238 YUMA AZ T-MOBILE USA, INC.
520-239 TUCSON AZ AT&T LOCAL
520-240 TUCSON AZ ALLTEL COMMUNICATIONS OF THE SOUTHWEST, LP - AZ
520-241 TUCSON AZ BLUE LICENSES HOLDING, LLC
520-243 TUCSON AZ QWEST CORPORATION
520-244 SIERRAVIST AZ NETWORK SERVICES LLC
520-245 TUCSON AZ T-MOBILE USA, INC.
520-247 TUCSON AZ BLUE LICENSES HOLDING, LLC
520-248 TUCSON AZ T-MOBILE USA, INC.
520-249 SIERRAVIST AZ SPRINT SPECTRUM L.P.- AZ
520-250 TUCSON AZ SPRINT SPECTRUM L.P.
520-251 CASAGRANDE AZ NEXTEL COMMUNICATIONS, INC.
520-252 CASAGRANDE AZ SPRINT SPECTRUM L.P.
520-253 WILLCOX AZ ALLTEL COMMUNICATIONS OF THE SOUTHWEST, LP - AZ
520-254 WILLCOX AZ LEVEL 3 COMMUNICATIONS, LLC - AZ
520-255 SIERRAVIST AZ ALLTEL COMMUNICATIONS OF THE SOUTHWEST, LP - AZ
520-256 TUCSON AZ SPRINT SPECTRUM L.P.
520-258 TUCSON AZ QWEST CORPORATION
520-259 TUCSON AZ NORTH COUNTY COMMUNICATIONS CORP.
520-260 TUCSON AZ CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ
520-264 NOGALES AZ AT&T LOCAL
520-265 BENSON AZ NEXTEL COMMUNICATIONS, INC.
520-266 SIERRAVIST AZ NEXTEL COMMUNICATIONS, INC.
520-267 SIERRAVIST AZ NORTH COUNTY COMMUNICATIONS CORP.
520-269 TUCSON AZ CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ
520-270 TUCSON AZ T-MOBILE USA, INC.
520-271 TUCSON AZ SPRINT SPECTRUM L.P.
520-272 TUCSON AZ LEAP WIRELESS INTL, INC. DBA CRICKET COMM, INC.
520-275 TUCSON AZ BLUE LICENSES HOLDING, LLC
520-280 CASAGRANDE AZ SPRINT SPECTRUM L.P.
520-281 NOGALES AZ QWEST CORPORATION
520-282 TUCSON AZ CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ
520-285 NOGALES AZ QWEST CORPORATION
520-287 NOGALES AZ QWEST CORPORATION
520-289 TUCSON AZ CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ
520-290 TUCSON AZ QWEST CORPORATION
520-291 TUCSON AZ QWEST CORPORATION
520-292 TUCSON AZ QWEST CORPORATION
520-293 TUCSON AZ QWEST CORPORATION
520-294 TUCSON AZ QWEST CORPORATION
520-295 TUCSON AZ QWEST CORPORATION
520-296 TUCSON AZ QWEST CORPORATION
520-297 TUCSON AZ QWEST CORPORATION
520-298 TUCSON AZ QWEST CORPORATION
520-299 TUCSON AZ QWEST CORPORATION
520-300 TUCSON AZ CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ
520-301 TUCSON AZ LEAP WIRELESS INTL, INC. DBA CRICKET COMM, INC.
520-302 TUCSON AZ LEAP WIRELESS INTL, INC. DBA CRICKET COMM, INC.
520-303 TUCSON AZ YMAX COMMUNICATIONS CORP. - AZ
520-304 TUCSON AZ LEAP WIRELESS INTL, INC. DBA CRICKET COMM, INC.
520-305 TUCSON AZ CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ
520-307 TUCSON AZ ALLTEL COMMUNICATIONS OF THE SOUTHWEST, LP - AZ
520-309 TUCSON AZ BLUE LICENSES HOLDING, LLC
520-311 AZ
520-312 TUCSON AZ LEAP WIRELESS INTL, INC. DBA CRICKET COMM, INC.
520-313 NOGALES AZ T-MOBILE USA, INC.
520-315 CASABLANCA AZ GILA RIVER TELECOMM, INC.
520-316 CASAGRANDE AZ QWEST CORPORATION
520-318 TUCSON AZ QWEST CORPORATION
520-319 TUCSON AZ QWEST CORPORATION
520-320 TUCSON AZ QWEST CORPORATION
520-321 TUCSON AZ QWEST CORPORATION
520-322 TUCSON AZ QWEST CORPORATION
520-323 TUCSON AZ QWEST CORPORATION
520-324 TUCSON AZ QWEST CORPORATION
520-325 TUCSON AZ QWEST CORPORATION
520-326 TUCSON AZ QWEST CORPORATION
520-327 TUCSON AZ QWEST CORPORATION