Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 517 [Rate centres in NPA 517] [Dial plan for NPA 517]

NXX: 307

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-307 A Jackson MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346   2025-11-20   
517-307 9 Jackson MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346   2025-11-20   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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