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: 256

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
313-256 A Detroit Zone 1 MI DTRTMIBHDS1  9323 MICHIGAN BELL TEL CO 340      
313-256 0 Detroit Zone 1 MI DTRTMIBHDS1  9323 MICHIGAN BELL TEL CO 340      
313-256 1 Detroit Zone 1 MI DTRTMIBHMMD  1200 TALK AMERICA INC. - MI 340   2005-12-12   
313-256 2 Detroit Zone 1 MI DTRTMIBHDS1  9323 MICHIGAN BELL TEL CO 340      
313-256 3 Detroit Zone 1 MI DTRTMIBHDS1  9323 MICHIGAN BELL TEL CO 340      
313-256 4 Detroit Zone 1 MI DTRTMIBHDS1  9323 MICHIGAN BELL TEL CO 340      
313-256 5 Detroit Zone 1 MI DTRTMIBHDS1  9323 MICHIGAN BELL TEL CO 340      
313-256 6 Detroit Zone 1 MI DTRTMIBHDS1  9323 MICHIGAN BELL TEL CO 340      
313-256 7 Detroit Zone 1 MI DTRTMIBHDS1  9323 MICHIGAN BELL TEL CO 340      
313-256 8 Detroit Zone 1 MI DTRTMIBHDS1  9323 MICHIGAN BELL TEL CO 340      
313-256 9 Detroit Zone 1 MI DTRTMIBHDS1  9323 MICHIGAN BELL TEL CO 340      

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

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