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: 774

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
313-774 A Detroit Zone 1 MI BRHMMIBDBMD  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340      
313-774 0 Detroit Zone 1 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2019-05-09   
313-774 1 Detroit Zone 1 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2019-05-09   
313-774 2 Detroit Zone 1 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2019-05-09   
313-774 3 Detroit Zone 1 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2019-05-09   
313-774 4 Detroit Zone 1 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2019-05-09   
313-774 5 Detroit Zone 1 MI BRHMMIBDBMD  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2019-12-11   
313-774 6 Detroit Zone 1 MI BRHMMIBDBMD  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2019-04-17   
313-774 7 Detroit Zone 1 MI LIVNMIUX0MD  5562 METROPCS, INC. 340   2020-06-16   
313-774 8 Detroit Zone 1 MI SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2019-05-24   
313-774 9 Detroit Zone 1 MI BRHMMIBDBMD  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2019-08-30   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.