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: 357

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
223-357 A York PA YORKPAXMXAX  547E ONVOY, LLC - PA 226   2024-03-09   
223-357 0 York PA   547E ONVOY, LLC - PA 226   2024-03-09   
223-357 1 York PA   547E ONVOY, LLC - PA 226   2024-03-10   
223-357 2 York PA   547E ONVOY, LLC - PA 226   2024-04-12   
223-357 3 York PA   732J NUSO, LLC 226   2024-06-21   
223-357 4 York PA   732J NUSO, LLC 226   2024-06-21   
223-357 5 York PA   547E ONVOY, LLC - PA 226   2024-07-01   
223-357 6 York PA   6392 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 226   2024-07-27   
223-357 7 York PA   6392 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 226   2024-07-27   
223-357 8 York PA   547E ONVOY, LLC - PA 226   2024-04-20   
223-357 9 York PA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 226   2024-04-06   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.