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: 599

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
580-599 A Enid OK OKCZOKZCFMD  5257 LEVEL 3 COMMUNICATIONS, LLC - OK 536      
580-599 0 Enid OK   5257 LEVEL 3 COMMUNICATIONS, LLC - OK 536      
580-599 1 Enid OK   5257 LEVEL 3 COMMUNICATIONS, LLC - OK 536      
580-599 2 Enid OK   6529 T-MOBILE USA, INC. 536   2018-09-22   
580-599 3 Enid OK   6529 T-MOBILE USA, INC. 536   2018-09-22   
580-599 4 Enid OK   6529 T-MOBILE USA, INC. 536   2018-09-22   
580-599 5 Enid OK   530C TELEPORT COMMUNICATIONS AMERICA OK - LLC 536   2019-07-05   
580-599 6 Enid OK   530C TELEPORT COMMUNICATIONS AMERICA OK - LLC 536   2014-03-10   
580-599 7 Enid OK   6529 T-MOBILE USA, INC. 536   2020-10-25   
580-599 8 Enid OK   6529 T-MOBILE USA, INC. 536   2020-10-25   
580-599 9 Enid OK   6529 T-MOBILE USA, INC. 536   2020-10-25   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.