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.

Porter, OK

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
539-449 A TULSOKTBXFY  119F BANDWIDTH.COM CLEC, LLC - OK 538      
539-449 0 TULSOKTBXXZ  624H ONVOY SPECTRUM, LLC 538   2025-01-23   
539-449 3 TULSOKTBXHY  409F ONVOY, LLC - OK 538   2021-03-04   
539-449 4 TULSOKTBXHY  409F ONVOY, LLC - OK 538   2021-03-04   
539-449 5 TULSOKTBXHY  409F ONVOY, LLC - OK 538   2020-10-29   
539-449 9 TULSOKTBXFY  119F BANDWIDTH.COM CLEC, LLC - OK 538   2020-03-22   
918-483 A PTEROKXCRS0  1165 VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 538      

Last updated: Sun, 17 May 2026 03:26:51 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.