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: 423

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
313-423 A Detroit Zone 2 MI LIVNMIUX8MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340      
313-423 0 Detroit Zone 2 MI FLNTMICD0MD  829J PAETEC ITEL, LLC 340   2005-05-06   
313-423 1 Detroit Zone 2 MI LIVNMIUX8MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2013-06-03   
313-423 2 Detroit Zone 2 MI LIVNMIUX8MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2014-09-27   
313-423 3 Detroit Zone 2 MI SFLDMITODS2  543C ONVOY, LLCV - MI 340   2013-01-31   
313-423 4 Detroit Zone 2 MI LIVNMIUX8MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2013-06-03   
313-423 5 Detroit Zone 2 MI LIVNMIUX8MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2013-06-03   
313-423 6 Detroit Zone 2 MI WAYNMIMNXUX  318J COMCAST IP PHONE, LLC 340   2013-10-07   
313-423 7 Detroit Zone 2 MI LIVNMIUX8MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2014-09-27   
313-423 8 Detroit Zone 2 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2013-03-31   
313-423 9 Detroit Zone 2 MI SFLDMIMKNMD  460K FIRST COMMUNICATIONS, LLC 340   2008-09-21   

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

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