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Area Codes > 773 > Central Office Codes

Exchange Rate Center State Operating Company
773-409 CHICGOZN02 IL AT&T LOCAL
773-410 CHICGOZN02 IL NEXTEL COMMUNICATIONS, INC.
773-411 IL
773-412 CHICGOZN03 IL SPRINT SPECTRUM L.P.
773-413 CHICGOZN05 IL AT&T LOCAL
773-414 CHICGOZN03 IL T-MOBILE USA, INC.
773-415 CHICGOZN01 IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
773-416 CHICGOZN01 IL UNITED STATES CELLULAR CORP. - ILLINOIS
773-417 CHICGOZN05 IL COMCAST PHONE OF ILLINOIS, LLC - IL
773-418 CHICGOZN03 IL NEXTEL COMMUNICATIONS, INC.
773-419 CHICGOZN01 IL UNITED STATES CELLULAR CORP. - ILLINOIS
773-420 CHICGOZN07 IL TELEPORT COMMUNICATIONS GROUP - CHICAGO
773-421 CHICGOZN01 IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
773-422 CHICGOZN01 IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
773-423 CHICGOZN02 IL ALLEGIANCE TELECOM, INC. - IL
773-424 CHICGOZN08 IL TELEPORT COMMUNICATIONS GROUP - CHICAGO
773-425 CHICGOZN03 IL SPRINT SPECTRUM L.P.
773-426 CHICGOZN03 IL SPRINT SPECTRUM L.P.
773-427 CHICGOZN03 IL AMERITECH ILLINOIS
773-428 CHICGOZN01 IL NEW CINGULAR WIRELESS PCS, LLC - IL
773-429 CHICGOZN10 IL AMERITECH ILLINOIS
773-430 CHICGOZN03 IL UNITED STATES CELLULAR CORP. - ILLINOIS
773-432 CHICGOZN08 IL CIMCO COMMUNICATIONS, INC. - IL
773-433 CHICGOZN02 IL NEXTEL COMMUNICATIONS, INC.
773-434 CHICGOZN08 IL AMERITECH ILLINOIS
773-435 CHICGOZN04 IL XO ILLINOIS, INC.
773-436 CHICGOZN08 IL AMERITECH ILLINOIS
773-437 CHICGOZN09 IL TELEPORT COMMUNICATIONS GROUP - CHICAGO
773-438 CHICGOZN01 IL ARCH WIRELESS HOLDINGS, INC.
773-439 CHICGOZN03 IL RCN TELECOM SERVICES OF ILLINOIS, INC. - IL
773-440 CHICGOZN10 IL UNITED STATES CELLULAR CORP. - ILLINOIS
773-442 CHICGOZN02 IL MCI WORLDCOM COMMUNICATIONS, INC. - IL
773-443 CHICGOZN01 IL UNITED STATES CELLULAR CORP. - ILLINOIS
773-444 CHICGOZN03 IL AMERITECH ILLINOIS
773-445 CHICGOZN10 IL AMERITECH ILLINOIS
773-446 CHICGOZN06 IL BROADWING COMMUNICATIONS, LLC - IL
773-447 CHICGOZN01 IL NEXTEL COMMUNICATIONS, INC.
773-448 CHICGOZN01 IL ARCH WIRELESS HOLDINGS, INC.
773-449 CHICGOZN09 IL RCN TELECOM SERVICES OF ILLINOIS, INC. - IL
773-450 CHICGOZN01 IL NEW CINGULAR WIRELESS PCS, LLC - IL
773-451 CHICGOZN07 IL AMERITECH ILLINOIS
773-452 CHICGOZN01 IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
773-453 CHICGOZN11 IL XO ILLINOIS, INC.
773-454 CHICGOZN03 IL SPRINT SPECTRUM L.P.
773-455 CHICGOZN11 IL MCI WORLDCOM COMMUNICATIONS, INC. - IL
773-456 CHICGOZN03 IL NEW CINGULAR WIRELESS PCS, LLC - IL
773-457 CHICGOZN07 IL NEXTEL COMMUNICATIONS, INC.
773-458 CHICGOZN03 IL MCI WORLDCOM COMMUNICATIONS, INC. - IL
773-459 CHICGOZN01 IL SPRINT SPECTRUM L.P.
773-460 CHICGOZN01 IL ARCH WIRELESS HOLDINGS, INC.
773-461 CHICGOZN01 IL ARCH WIRELESS HOLDINGS, INC.
773-462 CHICGOZN11 IL AMERITECH ILLINOIS
773-463 CHICGOZN02 IL AMERITECH ILLINOIS
773-464 CHICGOZN01 IL ARCH WIRELESS HOLDINGS, INC.
773-465 CHICGOZN02 IL AMERITECH ILLINOIS
773-466 CHICGOZN05 IL XO ILLINOIS, INC.
773-467 CHICGOZN03 IL AMERITECH ILLINOIS
773-468 CHICGOZN10 IL AMERITECH ILLINOIS
773-469 CHICGOZN01 IL SPRINT SPECTRUM L.P.
773-470 CHICGOZN08 IL XO ILLINOIS, INC.
773-471 CHICGOZN08 IL AMERITECH ILLINOIS
773-472 CHICGOZN04 IL AMERITECH ILLINOIS
773-473 CHICGOZN05 IL AMERITECH ILLINOIS
773-474 CHICGOZN10 IL OVATION COMMUNICATIONS OF ILLINOIS, INC.
773-475 CHICGOZN06 IL TELEPORT COMMUNICATIONS GROUP - CHICAGO
773-476 CHICGOZN08 IL AMERITECH ILLINOIS
773-477 CHICGOZN04 IL AMERITECH ILLINOIS
773-478 CHICGOZN02 IL AMERITECH ILLINOIS
773-479 CHICGOZN05 IL AMERITECH ILLINOIS
773-480 CHICGOZN01 IL NEW CINGULAR WIRELESS PCS, LLC - IL
773-481 CHICGOZN03 IL AMERITECH ILLINOIS
773-482 CHICGOZN11 IL OVATION COMMUNICATIONS OF ILLINOIS, INC.
773-483 CHICGOZN07 IL AMERITECH ILLINOIS
773-484 CHICGOZN07 IL OVATION COMMUNICATIONS OF ILLINOIS, INC.
773-485 CHICGOZN01 IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
773-486 CHICGOZN04 IL AMERITECH ILLINOIS
773-487 CHICGOZN07 IL AMERITECH ILLINOIS
773-488 CHICGOZN07 IL AMERITECH ILLINOIS
773-489 CHICGOZN04 IL AMERITECH ILLINOIS
773-490 CHICGOZN03 IL NEW CINGULAR WIRELESS PCS, LLC - IL
773-491 CHICGOZN03 IL NEXTEL COMMUNICATIONS, INC.
773-492 CHICGOZN01 IL ARCH WIRELESS HOLDINGS, INC.
773-493 CHICGOZN07 IL AMERITECH ILLINOIS
773-494 CHICGOZN03 IL NEXTEL COMMUNICATIONS, INC.
773-495 CHICGOZN01 IL SPRINT SPECTRUM L.P.
773-496 CHICGOZN07 IL OVATION COMMUNICATIONS OF ILLINOIS, INC.
773-497 CHICGOZN01 IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
773-498 CHICGOZN08 IL TELEPORT COMMUNICATIONS GROUP - CHICAGO
773-499 CHICGOZN03 IL UNITED STATES CELLULAR CORP. - ILLINOIS
773-500 IL
773-501 CHICGOZN03 IL T-MOBILE USA, INC.
773-502 CHICGOZN01 IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
773-503 CHICGOZN10 IL T-MOBILE USA, INC.
773-504 CHICGOZN01 IL NEW CINGULAR WIRELESS PCS, LLC - IL
773-505 CHICGOZN01 IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
773-506 CHICGOZN02 IL AMERITECH ILLINOIS
773-507 CHICGOZN03 IL UNITED STATES CELLULAR CORP. - ILLINOIS
773-508 CHICGOZN02 IL AMERITECH ILLINOIS
773-509 CHICGOZN02 IL AMERITECH ILLINOIS
773-510 CHICGOZN03 IL T-MOBILE USA, INC.