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.
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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   624H ONVOY SPECTRUM, LLC 538   2025-01-23   
539-449 3   409F ONVOY, LLC - OK 538   2021-03-04   
539-449 4   409F ONVOY, LLC - OK 538   2021-03-04   
539-449 5   409F ONVOY, LLC - OK 538   2020-10-29   
539-449 9   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: Thu, 29 Jan 2026 14:35:03 UTC

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