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: 924

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
313-924 A Detroit Zone 2 MI DTRTMIPEDS0  9323 MICHIGAN BELL TEL CO 340      
313-924 0 Detroit Zone 2 MI DTRTMIPEDS0  9323 MICHIGAN BELL TEL CO 340      
313-924 1 Detroit Zone 2 MI SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2006-09-05   
313-924 2 Detroit Zone 2 MI LIVNMIUX0MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2012-10-02   
313-924 3 Detroit Zone 2 MI SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2006-09-05   
313-924 4 Detroit Zone 2 MI SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2006-09-05   
313-924 5 Detroit Zone 2 MI WAYNMIMNXUX  318J COMCAST IP PHONE, LLC 340   2007-04-01   
313-924 6 Detroit Zone 2 MI DTRTMIPEDS0  9323 MICHIGAN BELL TEL CO 340      
313-924 7 Detroit Zone 2 MI   8685 US XCHANGE OF MICHIGAN LLC DBA CHOICE ONE COMM MI 340   2009-02-19   
313-924 8 Detroit Zone 2 MI WAYNMIMNXUX  318J COMCAST IP PHONE, LLC 340   2015-12-07   
313-924 9 Detroit Zone 2 MI DTRTMIPEDS0  9323 MICHIGAN BELL TEL CO 340      

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.