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.

NPA: 307 [Rate centres in NPA 307] [Dial plan for NPA 307]

NXX: 445

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-445 A Kemmerer WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654      
307-445 0 Kemmerer WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2021-07-11   
307-445 1 Kemmerer WY CHYNWYMAQMD  081F BANDWIDTH.COM CLEC, LLC - WY 654   2022-03-24   
307-445 2 Kemmerer WY CHYNWYMAQMD  081F BANDWIDTH.COM CLEC, LLC - WY 654   2022-11-06   
307-445 3 Kemmerer WY CHYNWYMAXGX  624H ONVOY SPECTRUM, LLC 654   2025-01-20   
307-445 4 Kemmerer WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2021-04-06   
307-445 5 Kemmerer WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2021-04-06   
307-445 9 Kemmerer WY CHYNWYMAQMD  081F BANDWIDTH.COM CLEC, LLC - WY 654   2022-02-14   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.