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: 223 [Rate centres in NPA 223] [Dial plan for NPA 223]

NXX: 391

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
223-391 A Ephrata PA EPHRPAXE4MD  547E ONVOY, LLC - PA 226   2026-06-08   
223-391 0 Ephrata PA   002F BANDWIDTH.COM CLEC, LLC - PA 226   2026-08-08   
223-391 1 Ephrata PA EPHRPAXE4MD  547E ONVOY, LLC - PA 226   2026-06-09   

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.