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.

Sterling, OK

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
580-315 A LWTNOKTBZMD  258F WICHITA ONLINE, INC. - OK 536      
580-365 A STNGOKXADS0  1965 WINDSTREAM OKLAHOMA, INC. 536      
580-972 A STNGOKXAPS0  1965 WINDSTREAM OKLAHOMA, INC. 536      
580-972 0 OKCYOKCEXJZ  624H ONVOY SPECTRUM, LLC 536   2025-01-22   
580-972 9 STNGOKXAPS0  1965 WINDSTREAM OKLAHOMA, INC. 536   2016-09-24   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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