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.

OCN: 1977 CENTRAL OKLAHOMA TELEPHONE CO., L.L.C.

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
918-368 A Kendrick OK DVPTOKXADS0  538      
918-374 A Tryon OK TRYNOKXADS0  538      
918-375 A Agra OK TRYNOKXADS0  538      
918-375 0 Agra OK TRYNOKXADS0  538      
918-375 2 Agra OK TRYNOKXADS0  538      
918-377 A Davenport OK DVPTOKXADS0  538      
918-667 A Boley OK BOLYOKXADS0  538      
918-668 A Castle OK BOLYOKXADS0  538      
918-866 A Sparks OK DVPTOKXADS0  538      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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