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: 317

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-317 A Cheyenne WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654      
307-317 0 Cheyenne WY   450F ONVOY, LLC - WY 654   2017-06-21   
307-317 1 Cheyenne WY   450F ONVOY, LLC - WY 654   2017-06-21   
307-317 2 Cheyenne WY   450F ONVOY, LLC - WY 654   2017-06-21   
307-317 3 Cheyenne WY   450F ONVOY, LLC - WY 654   2017-06-21   
307-317 4 Cheyenne WY   450F ONVOY, LLC - WY 654   2017-06-21   
307-317 5 Cheyenne WY   450F ONVOY, LLC - WY 654   2017-06-21   
307-317 6 Cheyenne WY   450F ONVOY, LLC - WY 654   2017-06-21   
307-317 7 Cheyenne WY   450F ONVOY, LLC - WY 654   2017-06-21   
307-317 8 Cheyenne WY   450F ONVOY, LLC - WY 654   2017-06-21   
307-317 9 Cheyenne WY   450F ONVOY, LLC - WY 654   2017-06-21   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.