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.

OCN: 450F ONVOY, LLC - WY

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
307-263 7 Cheyenne WY   654   2024-07-06   
307-269 5 Wheatland WY   654   2006-11-05   
307-269 7 Wheatland WY   654   2012-01-30   
307-269 8 Wheatland WY   654   2021-07-11   
307-269 9 Wheatland WY   654   2021-07-11   
307-271 6 Powell WY   654   2006-11-05   
307-271 8 Powell WY   654   2011-06-05   
307-275 3 Cheyenne WY   654   2012-12-13   
307-275 7 Cheyenne WY   654   2015-12-04   
307-275 8 Cheyenne WY   654   2012-12-13   
307-275 9 Cheyenne WY   654   2012-12-13   
307-278 7 Buffalo WY   654   2006-10-21   
307-284 2 Jackson WY   654   2020-01-20   
307-284 3 Jackson WY   654   2020-01-20   
307-284 4 Jackson WY   654   2020-09-05   
307-284 5 Jackson WY   654   2020-09-05   
307-285 0 Buffalo WY   654   2021-07-11   
307-285 2 Buffalo WY   654   2020-12-19   
307-285 3 Buffalo WY   654   2020-12-19   
307-285 4 Buffalo WY   654   2020-12-19   
307-285 5 Buffalo WY   654   2021-07-11   
307-288 1 Evanston WY   654   2012-12-17   
307-288 2 Evanston WY   654   2012-12-17   
307-288 3 Evanston WY   654   2019-08-09   
307-288 6 Evanston WY   654   2021-03-02   
307-288 7 Evanston WY   654   2006-11-05   
307-289 2 Cheyenne WY   654   2024-02-25   
307-289 3 Cheyenne WY   654   2024-02-25   
307-289 4 Cheyenne WY   654   2024-02-25   
307-289 5 Cheyenne WY   654   2024-02-25   
307-289 7 Cheyenne WY   654   2024-10-04   
307-289 8 Cheyenne WY   654   2023-07-23   
307-293 A Guernsey WY SCTSNEXUMMD  646      
307-293 0 Guernsey WY   646   2023-06-18   
307-293 1 Guernsey WY   646   2023-03-24   
307-293 2 Guernsey WY   646   2021-04-01   
307-293 3 Guernsey WY   646   2021-06-27   
307-293 4 Guernsey WY   646   2021-08-27   
307-293 5 Guernsey WY   646   2023-03-16   
307-293 6 Guernsey WY   646   2024-01-08   
307-293 7 Guernsey WY   646   2023-03-19   
307-293 9 Guernsey WY   646   2023-10-12   
307-294 0 Big Piney WY   654   2023-10-12   
307-295 A Torrington WY SCTSNEXUMMD  646      
307-295 0 Torrington WY   646   2024-01-08   
307-295 2 Torrington WY   646   2023-11-16   
307-296 A Cody WY CHYNWYMAX2X  654      
307-296 1 Cody WY   654   2012-12-13   
307-296 2 Cody WY   654   2012-12-13   
307-296 3 Cody WY   654   2012-12-13   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 >>

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.