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: 879G TELEPORT COMMUNICATIONS AMERICA WY-LLC

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
307-226 9 Afton WY   654   2020-09-02   
307-228 6 Gillette WY   654   2014-09-22   
307-264 7 Jackson WY   654   2014-07-10   
307-289 6 Cheyenne WY   654   2023-08-12   
307-292 5 Cheyenne WY   654   2025-02-03   
307-292 6 Cheyenne WY   654   2025-02-03   
307-294 A Big Piney WY CHYNWYMAX9X  654      
307-294 6 Big Piney WY   654   2023-10-02   
307-300 6 Powell WY   654   2020-09-07   
307-314 6 Laramie WY   654   2014-07-11   
307-323 6 Pinedale WY   654   2020-11-09   
307-338 6 Torrington WY   646   2020-11-15   
307-364 9 Green River WY   654   2020-09-03   
307-370 6 Rawlins WY   654   2020-10-26   
307-373 6 Greybull WY   654   2020-09-30   
307-388 7 Worland WY   654   2021-03-25   
307-412 6 Cheyenne WY   654   2025-06-02   
307-429 6 Sheridan WY   654   2014-10-01   
307-441 6 Casper WY   654   2013-03-18   
307-448 9 Rock Springs WY   654   2014-05-22   
307-458 6 Casper WY   654   2023-04-07   
307-481 9 Lusk WY   654   2020-09-07   
307-578 9 Cody WY   654   2015-02-02   
307-621 6 Buffalo WY   654   2014-11-20   
307-624 8 Douglas WY   654   2020-09-02   
307-800 5 Kemmerer WY   654   2020-09-07   
307-823 A Cheyenne WY CHYNWYMAX9X  654      
307-823 6 Cheyenne WY   654   2012-09-27   
307-829 3 Cheyenne WY   654   2016-09-08   
307-855 3 Riverton WY   654   2018-03-30   
307-881 9 Wheatland WY   654   2020-09-07   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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