Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 312 [Rate centres in NPA 312] [Dial plan for NPA 312]

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-728 A Chicago Zone 01-Calumet IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2017-12-18   
312-728 0 Chicago Zone 01-Calumet IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2017-12-18   
312-728 1 Chicago Zone 01-Calumet IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2018-04-02   
312-728 2 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2018-07-12   
312-728 3 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2018-07-12   
312-728 4 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2018-07-12   
312-728 5 Chicago Zone 01-Calumet IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2018-04-19   
312-728 6 Chicago Zone 01-Calumet IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2018-04-19   
312-728 7 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2018-07-12   
312-728 8 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2018-07-12   
312-728 9 Chicago Zone 01-Calumet IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2018-07-08   

Last updated: Wed, 01 Apr 2020 02:09:16 UTC

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