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: TULSOKTBXTZ

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
539-266 5 Sallisaw OK 197D VONAGE AMERICA LLC 538   2021-07-23   
539-430 A Tulsa OK 197D VONAGE AMERICA LLC 538      
539-430 0 Tulsa OK 197D VONAGE AMERICA LLC 538   2018-02-05   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.