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.

Switch: ENIDOKMA7MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
405-331 A Pauls Valley OK 612K CSC VOICE, LLC 536      
405-564 A Stillwater OK 612K CSC VOICE, LLC 536      
405-825 A Chickasha OK 612K CSC VOICE, LLC 536      
405-939 A Perkins OK 612K CSC VOICE, LLC 536      
405-991 A Lindsay OK 612K CSC VOICE, LLC 536      
572-203 A Noble OK 612K CSC VOICE, LLC 536      
572-215 A Wayne OK 612K CSC VOICE, LLC 536      
580-297 A Enid OK 612K CSC VOICE, LLC 536      

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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