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: 204

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
580-204 A Boswell OK OKCYOKCEXJY  409F ONVOY, LLC - OK 536      
580-204 0 Boswell OK OKCYOKCEDS7  384H PEERLESS NETWORK OF OKLAHOMA, LLC - OK 536   2016-02-18   
580-204 1 Boswell OK OKCYOKCEXEZ  073H TELNYX LLC 536   2021-03-22   
580-204 2 Boswell OK OKCYOKCEXBZ  073H TELNYX LLC 536   2019-09-28   
580-204 3 Boswell OK OKCYOKCEXJY  409F ONVOY, LLC - OK 536   2021-03-04   
580-204 4 Boswell OK OKCYOKCEXJY  409F ONVOY, LLC - OK 536   2016-06-14   
580-204 5 Boswell OK OKCYOKCEXJY  409F ONVOY, LLC - OK 536   2021-03-04   
580-204 6 Boswell OK OKCYOKCEXOY  530C TELEPORT COMMUNICATIONS AMERICA OK - LLC 536   2017-10-20   
580-204 7 Boswell OK OKCYOKCEXJZ  624H ONVOY SPECTRUM, LLC 536   2025-01-22   
580-204 8 Boswell OK OKCYOKCEXJY  409F ONVOY, LLC - OK 536   2021-07-16   
580-204 9 Boswell OK OKCYOKCEDS7  384H PEERLESS NETWORK OF OKLAHOMA, LLC - OK 536   2020-10-30   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.