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: 283

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-283 A Fork MD BLTMMDCHXAX  7421 AT&T - LOCAL 238      
667-283 0 Fork MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2021-01-08   
667-283 1 Fork MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2021-04-09   
667-283 2 Fork MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2023-08-10   
667-283 3 Fork MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-07-11   
667-283 4 Fork MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-07-11   
667-283 5 Fork MD BLTQMD01BMD  516J TON80 COMMUNICATIONS, LLC 238   2022-03-29   
667-283 6 Fork MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-01-20   
667-283 7 Fork MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-01-20   
667-283 8 Fork MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2021-02-26   
667-283 9 Fork MD BLTMMDCHXAX  7421 AT&T - LOCAL 238   2020-08-24   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.