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: 580 [Rate centres in NPA 580] [Dial plan for NPA 580]

NXX: 770

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
580-770 A Frederick OK OKCYOKMPAMD  5813 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 536      
580-770 0 Frederick OK   6272 UNITED STATES CELLULAR - OK 536   2026-04-06   
580-770 1 Frederick OK OKCYOKMPAMD  5813 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 536      

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.