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Area Codes > 773 > Central Office Codes

Exchange Rate Center State Operating Company
773-304 CHICGOZN03 IL ALLEGIANCE TELECOM, INC. - IL
773-305 CHICGOZN04 IL ALLEGIANCE TELECOM, INC. - IL
773-306 CHICGOZN08 IL AT&T LOCAL
773-307 CHICGOZN01 IL NEW CINGULAR WIRELESS PCS, LLC - IL
773-308 CHICGOZN03 IL GLOBALCOM, INC.-IL
773-309 CHICGOZN05 IL PAETEC COMMUNICATIONS, INC. - IL
773-310 CHICGOZN10 IL UNITED STATES CELLULAR CORP. - ILLINOIS
773-311 IL
773-313 CHICGOZN02 IL ALLEGIANCE TELECOM, INC. - IL
773-314 CHICGOZN03 IL ALLEGIANCE TELECOM, INC. - IL
773-315 CHICGOZN01 IL NEW CINGULAR WIRELESS PCS, LLC - IL
773-316 CHICGOZN01 IL NEW CINGULAR WIRELESS PCS, LLC - IL
773-317 CHICGOZN01 IL UNITED STATES CELLULAR CORP. - ILLINOIS
773-318 CHICGOZN03 IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
773-319 CHICGOZN10 IL UNITED STATES CELLULAR CORP. - ILLINOIS
773-320 CHICGOZN01 IL NEW CINGULAR WIRELESS PCS, LLC - IL
773-321 CHICGOZN06 IL BROADWING COMMUNICATIONS, LLC - IL
773-322 CHICGOZN07 IL T-MOBILE USA, INC.
773-323 CHICGOZN01 IL AMERICAN MESSAGING (AM), INC.
773-324 CHICGOZN07 IL AMERITECH ILLINOIS
773-325 CHICGOZN04 IL AMERITECH ILLINOIS
773-326 CHICGOZN07 IL BROADWING COMMUNICATIONS, LLC - IL
773-327 CHICGOZN04 IL AMERITECH ILLINOIS
773-328 CHICGOZN04 IL GLOBALCOM, INC.-IL
773-329 CHICGOZN03 IL AT&T LOCAL
773-330 CHICGOZN01 IL NEW CINGULAR WIRELESS PCS, LLC - IL
773-331 CHICGOZN03 IL MCI WORLDCOM COMMUNICATIONS, INC. - IL
773-332 CHICGOZN03 IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
773-333 CHICGOZN01 IL AMERICAN MESSAGING (AM), INC.
773-334 CHICGOZN02 IL AMERITECH ILLINOIS
773-335 CHICGOZN01 IL ARCH WIRELESS HOLDINGS, INC.
773-336 CHICGOZN09 IL GLOBALCOM, INC.-IL
773-337 CHICGOZN11 IL ALLEGIANCE TELECOM, INC. - IL
773-338 CHICGOZN02 IL AMERITECH ILLINOIS
773-339 CHICGOZN01 IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
773-340 CHICGOZN08 IL T-MOBILE USA, INC.
773-341 CHICGOZN10 IL GLOBALCOM, INC.-IL
773-342 CHICGOZN04 IL AMERITECH ILLINOIS
773-343 CHICGOZN01 IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
773-344 CHICGOZN10 IL MCIMETRO, ATS, INC.
773-345 CHICGOZN05 IL ALLEGIANCE TELECOM, INC. - IL
773-346 CHICGOZN06 IL ALLEGIANCE TELECOM, INC. - IL
773-347 CHICGOZN07 IL ALLEGIANCE TELECOM, INC. - IL
773-348 CHICGOZN04 IL AMERITECH ILLINOIS
773-349 CHICGOZN08 IL MCIMETRO, ATS, INC.
773-350 CHICGOZN01 IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
773-351 CHICGOZN01 IL NEW CINGULAR WIRELESS PCS, LLC - IL
773-352 CHICGOZN01 IL ARCH WIRELESS HOLDINGS, INC.
773-353 CHICGOZN03 IL BROADWING COMMUNICATIONS, LLC - IL
773-354 CHICGOZN01 IL SPRINT SPECTRUM L.P.
773-355 CHICGOZN03 IL OVATION COMMUNICATIONS OF ILLINOIS, INC.
773-356 CHICGOZN09 IL AMERITECH ILLINOIS
773-357 CHICGOZN11 IL GLOBALCOM, INC.-IL
773-358 CHICGOZN07 IL MCIMETRO, ATS, INC.
773-359 CHICGOZN09 IL MCIMETRO, ATS, INC.
773-360 CHICGOZN04 IL LEVEL 3 COMMUNICATIONS, LLC - IL
773-361 CHICGOZN07 IL AMERITECH ILLINOIS
773-362 CHICGOZN08 IL PAETEC COMMUNICATIONS, INC. - IL
773-363 CHICGOZN07 IL AMERITECH ILLINOIS
773-364 CHICGOZN09 IL OVATION COMMUNICATIONS OF ILLINOIS, INC.
773-365 CHICGOZN04 IL ALLEGIANCE TELECOM, INC. - IL
773-366 CHICGOZN10 IL T-MOBILE USA, INC.
773-368 CHICGOZN03 IL SPRINT SPECTRUM L.P.
773-369 CHICGOZN01 IL NEW CINGULAR WIRELESS PCS, LLC - IL
773-370 CHICGOZN01 IL UNITED STATES CELLULAR CORP. - ILLINOIS
773-371 CHICGOZN07 IL AMERITECH ILLINOIS
773-373 CHICGOZN07 IL AMERITECH ILLINOIS
773-374 CHICGOZN09 IL AMERITECH ILLINOIS
773-375 CHICGOZN09 IL AMERITECH ILLINOIS
773-376 CHICGOZN06 IL AMERITECH ILLINOIS
773-377 CHICGOZN11 IL TELEPORT COMMUNICATIONS GROUP - CHICAGO
773-378 CHICGOZN05 IL AMERITECH ILLINOIS
773-379 CHICGOZN05 IL AMERITECH ILLINOIS
773-380 CHICGOZN03 IL AMERITECH ILLINOIS
773-381 CHICGOZN02 IL AMERITECH ILLINOIS
773-382 CHICGOZN09 IL OVATION COMMUNICATIONS OF ILLINOIS, INC.
773-383 CHICGOZN03 IL NEW CINGULAR WIRELESS PCS, LLC - IL
773-384 CHICGOZN04 IL AMERITECH ILLINOIS
773-385 CHICGOZN05 IL AMERITECH ILLINOIS
773-386 CHICGOZN01 IL UNITED STATES CELLULAR CORP. - ILLINOIS
773-387 CHICGOZN10 IL T-MOBILE USA, INC.
773-388 CHICGOZN04 IL AMERITECH ILLINOIS
773-389 CHICGOZN09 IL ALLEGIANCE TELECOM, INC. - IL
773-390 CHICGOZN01 IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
773-391 CHICGOZN01 IL NEW CINGULAR WIRELESS PCS, LLC - IL
773-392 CHICGOZN01 IL UNITED STATES CELLULAR CORP. - ILLINOIS
773-393 CHICGOZN01 IL ARCH WIRELESS HOLDINGS, INC.
773-394 CHICGOZN04 IL AMERITECH ILLINOIS
773-395 CHICGOZN04 IL AMERITECH ILLINOIS
773-396 CHICGOZN10 IL OVATION COMMUNICATIONS OF ILLINOIS, INC.
773-398 CHICGOZN03 IL SPRINT SPECTRUM L.P.
773-399 CHICGOZN03 IL AMERITECH ILLINOIS
773-400 CHICGOZN01 IL AMERICAN MESSAGING (AM), INC.
773-401 CHICGOZN01 IL NEW CINGULAR WIRELESS PCS, LLC - IL
773-402 CHICGOZN01 IL NEW CINGULAR WIRELESS PCS, LLC - IL
773-403 CHICGOZN03 IL UNITED STATES CELLULAR CORP. - ILLINOIS
773-404 CHICGOZN04 IL AMERITECH ILLINOIS
773-405 CHICGOZN01 IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
773-406 CHICGOZN07 IL NEXTEL COMMUNICATIONS, INC.
773-407 CHICGOZN03 IL UNITED STATES CELLULAR CORP. - ILLINOIS