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: 493

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
313-493 A Detroit Zone 4 MI DTRTMIVTDS0  9323 MICHIGAN BELL TEL CO 340      
313-493 0 Detroit Zone 4 MI DTRTMIVTDS0  9323 MICHIGAN BELL TEL CO 340      
313-493 1 Detroit Zone 4 MI DTRTMIVTDS0  9323 MICHIGAN BELL TEL CO 340      
313-493 2 Detroit Zone 4 MI LIVNMIUX0MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2012-12-19   
313-493 3 Detroit Zone 4 MI DTRTMIVTDS0  9323 MICHIGAN BELL TEL CO 340      
313-493 4 Detroit Zone 4 MI DTRTMIVTDS0  9323 MICHIGAN BELL TEL CO 340      
313-493 5 Detroit Zone 4 MI DTRTMIVWDMD  624H ONVOY SPECTRUM, LLC 340   2021-11-13   
313-493 6 Detroit Zone 4 MI DTRTMIVTDS0  9323 MICHIGAN BELL TEL CO 340      
313-493 7 Detroit Zone 4 MI DTRTMIVTDS0  9323 MICHIGAN BELL TEL CO 340      
313-493 8 Detroit Zone 4 MI DTRTMIVTDS0  9323 MICHIGAN BELL TEL CO 340      
313-493 9 Detroit Zone 4 MI DTRTMIVTDS0  9323 MICHIGAN BELL TEL CO 340      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.