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: MNFROKXADS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
918-242 A Prue OK 1982 CIMARRON TEL. CO. 538      
918-243 A Keystone OK 1982 CIMARRON TEL. CO. 538      
918-354 A Osage OK 1982 CIMARRON TEL. CO. 538      
918-356 A Hallett OK 1982 CIMARRON TEL. CO. 538      
918-363 A Mannford East OK 1982 CIMARRON TEL. CO. 538      
918-454 A Maramec OK 1982 CIMARRON TEL. CO. 538      
918-538 A Blackburn OK 1982 CIMARRON TEL. CO. 538      
918-757 A Jennings OK 1982 CIMARRON TEL. CO. 538      
918-767 A Skedee OK 1982 CIMARRON TEL. CO. 538      
918-865 A Mannford OK 1982 CIMARRON TEL. CO. 538      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.