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: 375

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
223-375 A Columbia PA   6392 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 226   2025-07-12   
223-375 0 Columbia PA   6392 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 226   2025-07-12   
223-375 1 Columbia PA   6392 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 226   2025-07-12   
223-375 2 Columbia PA   6392 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 226   2025-07-12   
223-375 3 Columbia PA   6392 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 226   2025-07-12   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.