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: 616

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
313-616 A Detroit Zone 1 MI   770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2025-07-18   
313-616 0 Detroit Zone 1 MI   732J NUSO, LLC 340   2025-07-21   
313-616 1 Detroit Zone 1 MI   732J NUSO, LLC 340   2025-07-21   
313-616 4 Detroit Zone 1 MI   770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2025-07-18   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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