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: 422

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
313-422 A Detroit Zone 3 MI SFLDMIQJDS1  7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
313-422 0 Detroit Zone 3 MI SFLDMIQJDS1  7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
313-422 1 Detroit Zone 3 MI SFLDMIQJDS1  7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
313-422 2 Detroit Zone 3 MI   3535 ACD TELECOM, INC. - MI 340   2005-12-08   
313-422 3 Detroit Zone 3 MI LIVNMIUX0MD  5562 METROPCS, INC. 340   2006-01-29   
313-422 4 Detroit Zone 3 MI SFLDMIQJDS1  7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
313-422 5 Detroit Zone 3 MI LIVNMIUX0MD  5562 METROPCS, INC. 340   2006-01-29   
313-422 6 Detroit Zone 3 MI SFLDMIQJDS1  7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
313-422 7 Detroit Zone 3 MI SFLDMITODS2  543C ONVOY, LLCV - MI 340   2020-09-12   
313-422 8 Detroit Zone 3 MI FLNTMICD0MD  829J PAETEC ITEL, LLC 340   2004-01-13   
313-422 9 Detroit Zone 3 MI SFLDMITODS2  543C ONVOY, LLCV - MI 340   2018-09-10   

Last updated: Sat, 02 May 2026 12:20:53 UTC

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