Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 947 [Rate centres in NPA 947] [Dial plan for NPA 947]

NXX: 299

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
947-299 A Birmingham MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 340   2026-04-10   
947-299 7 Birmingham MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 340   2026-04-10   
947-299 8 Birmingham MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 340   2026-04-10   
947-299 9 Birmingham MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 340   2026-04-10   

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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