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: 536

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-536 A Still Pond MD   490J DISH WIRELESS, LLC 242   2026-03-05   
667-536 0 Still Pond MD   490J DISH WIRELESS, LLC 242   2026-03-05   
667-536 1 Still Pond MD   490J DISH WIRELESS, LLC 242   2026-03-05   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.