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: 376

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
580-376 A Idabel OK IDBLOKMARL1  9533 SOUTHWESTERN BELL 536      
580-376 1 Idabel OK   409F ONVOY, LLC - OK 536   2016-06-26   
580-376 2 Idabel OK   409F ONVOY, LLC - OK 536   2016-06-26   
580-376 3 Idabel OK   7258 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 536   2016-04-01   
580-376 4 Idabel OK   409F ONVOY, LLC - OK 536   2016-06-26   
580-376 5 Idabel OK   9533 SOUTHWESTERN BELL 536      
580-376 6 Idabel OK   530C TELEPORT COMMUNICATIONS AMERICA OK - LLC 536   2016-02-08   
580-376 8 Idabel OK   624H ONVOY SPECTRUM, LLC 536   2025-01-22   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.