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Area Codes > 520 > Central Office Codes

Exchange Rate Center State Operating Company
520-331 TUCSON AZ T-MOBILE USA, INC.
520-337 WILLCOX AZ LEVEL 3 COMMUNICATIONS, LLC - AZ
520-342 TUCSON AZ 360NETWORKS (USA) INC. - AZ
520-343 TUCSON AZ CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ
520-344 TUCSON AZ ESCHELON TELECOM OF ARIZONA, INC. - AZ
520-349 TUCSON AZ ALLTEL COMMUNICATIONS OF THE SOUTHWEST, LP - AZ
520-350 CASAGRANDE AZ GILA LOCAL EXCHANGE CARRIER, INC. - AZ
520-351 TUCSON AZ XSPEDIUS MANANGEMENT CO. SWITCHED SERVICES, LLC AZ
520-352 TUCSON AZ MOUNTAIN TELECOMMUNICATIONS, INC. - CLEC
520-356 HAYDEN AZ QWEST CORPORATION
520-357 HAYDEN AZ QWEST CORPORATION
520-358 TUCSON AZ LEAP WIRELESS INTL, INC. DBA CRICKET COMM, INC.
520-360 TUCSON AZ BLUE LICENSES HOLDING, LLC
520-361 SANTA ROSA AZ TOHONO O'ODHAM UTILITY AUTHORITY
520-362 W SANSIMON AZ TOHONO O'ODHAM UTILITY AUTHORITY
520-363 HAYDEN AZ QWEST CORPORATION
520-364 DOUGLAS AZ QWEST CORPORATION
520-366 BISBEE AZ QWEST CORPORATION
520-368 DOUGLAS AZ QWEST CORPORATION
520-370 TUCSON AZ SPRINT SPECTRUM L.P.
520-371 CASAGRANDE AZ SPRINT SPECTRUM L.P.
520-374 CASAGRANDE AZ QWEST CORPORATION
520-375 NOGALES AZ QWEST CORPORATION
520-377 NOGALES AZ QWEST CORPORATION
520-378 SIERRAVIST AZ QWEST CORPORATION
520-381 CASAGRANDE AZ MOUNTAIN TELECOMMUNICATIONS, INC. - CLEC
520-382 TUCSON AZ XSPEDIUS MANANGEMENT CO. SWITCHED SERVICES, LLC AZ
520-383 SELLS AZ TOHONO O'ODHAM UTILITY AUTHORITY
520-384 WILLCOX AZ QWEST CORPORATION
520-385 SAN MANUEL AZ QWEST CORPORATION
520-387 AJO AZ TABLE TOP TELEPHONE CO., INC.
520-388 TUCSON AZ QWEST CORPORATION
520-390 TUCSON AZ SPRINT SPECTRUM L.P.
520-391 CASAGRANDE AZ MOUNTAIN TELECOMMUNICATIONS, INC. - CLEC
520-393 TUCSON AZ QWEST CORPORATION
520-394 NOGALES AZ QWEST CORPORATION
520-395 TUCSON AZ COMCAST PHONE OF ARIZONA, LLC - AZ
520-396 TUCSON AZ CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ
520-397 NOGALES AZ QWEST CORPORATION
520-398 TUCSON AZ QWEST CORPORATION
520-399 TUCSON AZ QWEST CORPORATION
520-400 TUCSON AZ CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ
520-401 TUCSON AZ SPRINT SPECTRUM L.P.
520-403 TUCSON AZ CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ
520-404 TUCSON AZ CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ
520-405 TUCSON AZ CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ
520-406 TUCSON AZ LEAP WIRELESS INTL, INC. DBA CRICKET COMM, INC.
520-407 TUCSON AZ QWEST CORPORATION
520-408 TUCSON AZ QWEST CORPORATION
520-409 TUCSON AZ LEAP WIRELESS INTL, INC. DBA CRICKET COMM, INC.
520-410 TUCSON AZ QWEST CORPORATION
520-411 AZ
520-413 CASAGRANDE AZ LEVEL 3 COMMUNICATIONS, LLC - AZ
520-414 CASAGRANDE AZ LEVEL 3 COMMUNICATIONS, LLC - AZ
520-417 SIERRAVIST AZ QWEST CORPORATION
520-418 STOTONIC AZ GILA RIVER TELECOMM, INC.
520-419 TUCSON AZ ALLTEL COMMUNICATIONS OF THE SOUTHWEST, LP - AZ
520-421 CASAGRANDE AZ QWEST CORPORATION
520-423 CASAGRANDE AZ QWEST CORPORATION
520-424 CASAGRANDE AZ QWEST CORPORATION
520-425 TUCSON AZ CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ
520-426 CASAGRANDE AZ QWEST CORPORATION
520-429 TUCSON AZ CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ
520-430 MARCOPAVLG AZ GILA RIVER TELECOMM, INC.
520-431 CASAGRANDE AZ BLUE LICENSES HOLDING, LLC
520-432 BISBEE AZ QWEST CORPORATION
520-434 TUCSON AZ QWEST CORPORATION
520-435 AZ
520-437 TUCSON AZ XO ARIZONA, INC.
520-439 SIERRAVIST AZ QWEST CORPORATION
520-440 TUCSON AZ T-MOBILE USA, INC.
520-443 TUCSON AZ T-MOBILE USA, INC.
520-444 TUCSON AZ CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ
520-445 TUCSON AZ LEAP WIRELESS INTL, INC. DBA CRICKET COMM, INC.
520-446 TUCSON AZ QWEST CORPORATION
520-449 TUCSON AZ ALLTEL COMMUNICATIONS OF THE SOUTHWEST, LP - AZ
520-450 CASAGRANDE AZ T-MOBILE USA, INC.
520-452 SIERRAVIST AZ QWEST CORPORATION
520-455 NOGALES AZ QWEST CORPORATION
520-456 SIERRAVIST AZ QWEST CORPORATION
520-457 TOMBSTONE AZ QWEST CORPORATION
520-458 SIERRAVIST AZ QWEST CORPORATION
520-459 SIERRAVIST AZ QWEST CORPORATION
520-461 TUCSON AZ ELECTRIC LIGHTWAVE, LLC DBA INTEGRA TELECOM - AZ
520-463 WHITLOW AZ QWEST CORPORATION
520-464 CASAGRANDE AZ QWEST CORPORATION
520-465 TUCSON AZ BLUE LICENSES HOLDING, LLC
520-466 CASAGRANDE AZ QWEST CORPORATION
520-468 TUCSON AZ NEUTRAL TANDEM-ARIZONA, LLC - AZ
520-469 TUCSON AZ QWEST CORPORATION
520-470 NOGALES AZ SPRINT SPECTRUM L.P.
520-471 TUCSON AZ ALLTEL COMMUNICATIONS OF THE SOUTHWEST, LP - AZ
520-481 TUCSON AZ T-MOBILE USA, INC.
520-483 CASAGRANDE AZ CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ
520-487 SAN MANUEL AZ QWEST CORPORATION
520-488 TUCSON AZ ALLTEL COMMUNICATIONS OF THE SOUTHWEST, LP - AZ
520-489 TUCSON AZ QWEST CORPORATION
520-490 TUCSON AZ CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ
520-491 FLAGSTAFF AZ T-MOBILE USA, INC.
520-494 CASAGRANDE AZ QWEST CORPORATION