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: 284

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
313-284 A Detroit Zone 2 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340      
313-284 0 Detroit Zone 2 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2016-06-12   
313-284 1 Detroit Zone 2 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2016-06-12   
313-284 2 Detroit Zone 2 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2016-06-12   
313-284 3 Detroit Zone 2 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2016-10-23   
313-284 4 Detroit Zone 2 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2016-10-23   
313-284 5 Detroit Zone 2 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2016-10-23   
313-284 6 Detroit Zone 2 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2017-02-10   
313-284 7 Detroit Zone 2 MI SFLDMITODS2  543C ONVOY, LLCV - MI 340   2016-12-17   
313-284 8 Detroit Zone 2 MI SFLDMITODS2  543C ONVOY, LLCV - MI 340   2016-12-17   
313-284 9 Detroit Zone 2 MI SFLDMITODS2  543C ONVOY, LLCV - MI 340   2017-07-13   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.