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: 437

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
313-437 A Detroit Zone 4 MI BRHMMIBDBMD  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340      
313-437 0 Detroit Zone 4 MI LIVNMIUX8MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2010-10-08   
313-437 1 Detroit Zone 4 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2010-06-26   
313-437 2 Detroit Zone 4 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2010-06-26   
313-437 3 Detroit Zone 4 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2010-06-26   
313-437 4 Detroit Zone 4 MI SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2011-04-23   
313-437 5 Detroit Zone 4 MI LIVNMIUX8MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2010-10-08   
313-437 6 Detroit Zone 4 MI BRHMMIBDBMD  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2010-06-21   
313-437 7 Detroit Zone 4 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2010-12-02   
313-437 8 Detroit Zone 4 MI SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2010-12-10   
313-437 9 Detroit Zone 4 MI SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2010-12-10   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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