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: 877

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
313-877 A Detroit Zone 1 MI DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340      
313-877 0 Detroit Zone 1 MI DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340      
313-877 1 Detroit Zone 1 MI DTRTMIBHDS1  9323 MICHIGAN BELL TEL CO 340      
313-877 2 Detroit Zone 1 MI DTRTMIBHDS1  9323 MICHIGAN BELL TEL CO 340      
313-877 3 Detroit Zone 1 MI LIVNMIUX0MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2014-12-03   
313-877 4 Detroit Zone 1 MI DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340      
313-877 5 Detroit Zone 1 MI DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340      
313-877 6 Detroit Zone 1 MI DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340      
313-877 7 Detroit Zone 1 MI DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340      
313-877 8 Detroit Zone 1 MI DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340      
313-877 9 Detroit Zone 1 MI DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340      

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.