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: 294

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
313-294 A Detroit Zone 6 MI LNPKMIATDS0  9323 MICHIGAN BELL TEL CO 340      
313-294 0 Detroit Zone 6 MI LNPKMIATDS0  9323 MICHIGAN BELL TEL CO 340      
313-294 1 Detroit Zone 6 MI LNPKMIATDS0  9323 MICHIGAN BELL TEL CO 340      
313-294 2 Detroit Zone 6 MI LNPKMIATDS0  9323 MICHIGAN BELL TEL CO 340      
313-294 3 Detroit Zone 6 MI LNPKMIATDS0  9323 MICHIGAN BELL TEL CO 340      
313-294 4 Detroit Zone 6 MI LNPKMIATDS0  9323 MICHIGAN BELL TEL CO 340      
313-294 5 Detroit Zone 6 MI   046L CLEAR RATE COMMUNICATIONS, LLC 340   2008-07-12   
313-294 6 Detroit Zone 6 MI LNPKMIATDS0  9323 MICHIGAN BELL TEL CO 340      
313-294 7 Detroit Zone 6 MI SFLDMIMKNMD  460K FIRST COMMUNICATIONS, LLC 340   2008-07-18   
313-294 8 Detroit Zone 6 MI LNPKMIATDS0  9323 MICHIGAN BELL TEL CO 340      
313-294 9 Detroit Zone 6 MI LNPKMIATDS0  9323 MICHIGAN BELL TEL CO 340      

Last updated: Sun, 17 May 2026 03:26:51 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.