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: 483

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
313-483 A Detroit Zone 1 MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
313-483 0 Detroit Zone 1 MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
313-483 1 Detroit Zone 1 MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
313-483 2 Detroit Zone 1 MI LIVNMIUX0MD  5562 METROPCS, INC. 340   2007-02-26   
313-483 3 Detroit Zone 1 MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
313-483 4 Detroit Zone 1 MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
313-483 5 Detroit Zone 1 MI   543C ONVOY, LLCV - MI 340   2025-06-19   
313-483 6 Detroit Zone 1 MI SFLDMITODS2  543C ONVOY, LLCV - MI 340   2021-12-07   
313-483 7 Detroit Zone 1 MI SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2006-06-11   
313-483 8 Detroit Zone 1 MI SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2006-06-11   
313-483 9 Detroit Zone 1 MI SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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