Local Calling Guide
Area code/prefix search
NPA: 312 [Rate centres in NPA 312] [Dial plan for NPA 312]
NXX: 673
NPA-NXX | BLOCK | Rate Centre | Region | Switch | OCN | LATA | LIR | Eff date | Disc date |
---|---|---|---|---|---|---|---|---|---|
312-673 | A | Chicago Zone 01-Calumet | IL | CHCGIL24DS3 | 4604 FIRST COMMUNICATIONS, LLC - IL | 358 |
Last updated: Fri, 22 Mar 2024 03:02:44 UTC
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