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: 536

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
313-536 A Detroit Zone 4 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340      
313-536 0 Detroit Zone 4 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2021-04-17   
313-536 1 Detroit Zone 4 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2021-04-17   
313-536 2 Detroit Zone 4 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2021-04-17   
313-536 3 Detroit Zone 4 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2021-04-18   
313-536 4 Detroit Zone 4 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2021-04-18   
313-536 5 Detroit Zone 4 MI DTRTMIVWDMD  624H ONVOY SPECTRUM, LLC 340   2021-06-13   
313-536 6 Detroit Zone 4 MI SFLDMITODS2  543C ONVOY, LLCV - MI 340   2021-06-17   
313-536 7 Detroit Zone 4 MI SFLDMITODS2  543C ONVOY, LLCV - MI 340   2021-06-17   
313-536 8 Detroit Zone 4 MI SFLDMITODS2  543C ONVOY, LLCV - MI 340   2021-06-17   
313-536 9 Detroit Zone 4 MI SFLDMITODS2  543C ONVOY, LLCV - MI 340   2021-06-17   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.