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: 429

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
313-429 A Detroit Zone 6 MI DTRTMIBADS0  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340      
313-429 0 Detroit Zone 6 MI SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2006-07-03   
313-429 1 Detroit Zone 6 MI SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2006-07-03   
313-429 2 Detroit Zone 6 MI DTRTMIBADS0  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340      
313-429 3 Detroit Zone 6 MI TROYMIUVPS0  668E SIGECOM, LLC DBA WOW INTERNET CABLE AND PHONE 340   2006-06-08   
313-429 4 Detroit Zone 6 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2014-07-19   
313-429 5 Detroit Zone 6 MI FMHLMIDWDS0  7701 PHONE MICHIGAN 340   2008-06-19   
313-429 6 Detroit Zone 6 MI SFLDMIWKDS2  4125 XO COMMUNICATIONS SERVICES, INC. - MI 340   2005-07-19   
313-429 7 Detroit Zone 6 MI SFLDMIWKDS2  4125 XO COMMUNICATIONS SERVICES, INC. - MI 340   2005-07-19   
313-429 8 Detroit Zone 6 MI SFLDMIWKDS0  4125 XO COMMUNICATIONS SERVICES, INC. - MI 340   2005-07-19   
313-429 9 Detroit Zone 6 MI TROYMIUVPS0  668E SIGECOM, LLC DBA WOW INTERNET CABLE AND PHONE 340   2007-08-15   

Last updated: Sun, 07 Feb 2021 01:52:50 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.