Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 313 [Rate centres in NPA 313] [Dial plan for NPA 313]

NXX: 425

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
313-425 A Detroit Zone 6 MI DRBRMIFBDS0  9323 MICHIGAN BELL TEL CO 340      
313-425 0 Detroit Zone 6 MI DRBRMIFBDS0  9323 MICHIGAN BELL TEL CO 340      
313-425 1 Detroit Zone 6 MI LIVNMIUX0MD  5562 METROPCS, INC. 340   2006-01-29   
313-425 2 Detroit Zone 6 MI DRBRMIFBDS0  9323 MICHIGAN BELL TEL CO 340      
313-425 3 Detroit Zone 6 MI DRBRMIFBDS0  9323 MICHIGAN BELL TEL CO 340      
313-425 4 Detroit Zone 6 MI DRBRMIFBDS0  9323 MICHIGAN BELL TEL CO 340      
313-425 5 Detroit Zone 6 MI SFLDMIMKDS2  933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 340   2019-12-30   
313-425 6 Detroit Zone 6 MI LIVNMIUX0MD  5562 METROPCS, INC. 340   2007-02-26   
313-425 7 Detroit Zone 6 MI SFLDMITODS2  543C ONVOY, LLCV - MI 340   2013-11-20   
313-425 8 Detroit Zone 6 MI SFLDMITODS2  543C ONVOY, LLCV - MI 340   2013-11-20   
313-425 9 Detroit Zone 6 MI   3535 ACD TELECOM, INC. - MI 340   2005-12-08   

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.