Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 313 [Rate centres in NPA 313] [Dial plan for NPA 313]

NXX: 414

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
313-414 A Detroit Zone 6 MI LIVNMIUX8MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340      

Last updated: Tue, 07 Oct 2025 16:47:53 UTC

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