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: 667 [Rate centres in NPA 667] [Dial plan for NPA 667]

NXX: 657

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-657 A Chase MD PIVLMDPKX8X  566J RADIANTIQ LLC 238   2021-05-22   
667-657 0 Chase MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2021-07-30   
667-657 1 Chase MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2021-08-14   
667-657 2 Chase MD   876D ONVOY, LLC - MD 238   2021-09-23   
667-657 3 Chase MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2021-12-06   
667-657 4 Chase MD   624H ONVOY SPECTRUM, LLC 238   2021-11-26   
667-657 5 Chase MD   624H ONVOY SPECTRUM, LLC 238   2021-11-26   
667-657 6 Chase MD   566J RADIANTIQ LLC 238   2021-05-22   
667-657 7 Chase MD   624H ONVOY SPECTRUM, LLC 238   2021-09-10   
667-657 8 Chase MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2021-09-22   
667-657 9 Chase MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2021-09-22   

Last updated: Fri, 01 Jul 2022 02:53:40 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.