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
312-820 A Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2020-03-09   
312-820 0 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2020-03-09   
312-820 1 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2020-03-09   
312-820 2 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2020-03-09   
312-820 3 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2020-03-09   
312-820 4 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2020-03-09   
312-820 5 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2020-03-09   
312-820 6 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2020-03-09   
312-820 7 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2020-03-09   
312-820 8 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2020-03-09   
312-820 9 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2020-03-09   

Last updated: Sat, 11 Jul 2020 20:37:26 UTC

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