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: 368

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
223-368 A Lewistown (Mifflin) PA HRBGPAHAX9Z  547E ONVOY, LLC - PA 226   2024-11-01   
223-368 0 Lewistown (Mifflin) PA   547E ONVOY, LLC - PA 226   2024-11-01   
223-368 2 Lewistown (Mifflin) PA   547E ONVOY, LLC - PA 226   2025-01-06   
223-368 3 Lewistown (Mifflin) PA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 226   2024-12-30   
223-368 4 Lewistown (Mifflin) PA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 226   2024-12-30   
223-368 8 Lewistown (Mifflin) PA   547E ONVOY, LLC - PA 226   2025-04-12   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.