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
307-500 6 Border WY   652   2021-04-06   
307-509 5 Cheyenne WY   654   2019-09-07   
307-522 3 Rock Springs WY   654   2019-09-07   
307-522 4 Rock Springs WY   654   2020-12-19   
307-529 A Cheyenne WY   654   2025-03-23   
307-529 0 Cheyenne WY   654   2009-10-09   
307-529 8 Cheyenne WY   654   2025-04-11   
307-533 1 Sheridan WY   654   2024-04-26   
307-533 9 Sheridan WY   654   2023-07-23   
307-543 4 Moran WY   654   2012-12-17   
307-543 7 Moran WY   654   2007-03-23   
307-543 8 Moran WY   654   2012-01-30   
307-545 1 Old Faithful WY   650   2012-12-13   
307-545 5 Old Faithful WY   650   2012-12-13   
307-545 6 Old Faithful WY   650   2007-04-21   
307-545 8 Old Faithful WY   650   2012-12-13   
307-554 A Glenrock WY CHYNWYMAX2X  654      
307-554 1 Glenrock WY   654   2019-05-24   
307-554 2 Glenrock WY   654   2020-12-19   
307-554 3 Glenrock WY   654   2020-12-19   
307-554 5 Glenrock WY   654   2019-09-07   
307-554 7 Glenrock WY   654   2007-03-09   
307-554 8 Glenrock WY   654   2012-01-13   
307-554 9 Glenrock WY   654   2021-03-02   
307-556 A Riverton WY CHYNWYMAX2X  654      
307-556 1 Riverton WY   654   2023-08-11   
307-556 2 Riverton WY   654   2021-07-11   
307-556 3 Riverton WY   654   2021-07-11   
307-556 4 Riverton WY   654   2023-08-11   
307-556 5 Riverton WY   654   2021-04-06   
307-556 6 Riverton WY   654   2021-04-06   
307-556 7 Riverton WY   654   2023-08-11   
307-556 8 Riverton WY   654   2023-08-11   
307-620 7 Buffalo WY   654   2012-01-30   
307-621 2 Buffalo WY   654   2019-07-08   
307-621 3 Buffalo WY   654   2019-07-08   
307-621 4 Buffalo WY   654   2019-11-07   
307-621 5 Buffalo WY   654   2019-11-07   
307-624 5 Douglas WY   654   2023-10-28   
307-624 6 Douglas WY   654   2019-09-07   
307-650 4 Cheyenne WY   654   2019-11-07   
307-650 5 Cheyenne WY   654   2019-11-07   
307-655 7 Sheridan WY   654   2006-11-05   
307-666 0 Cheyenne WY   654   2023-10-28   
307-667 A Rawlins WY CHYNWYMAX2X  654      
307-667 0 Rawlins WY   654   2021-07-11   
307-667 1 Rawlins WY   654   2021-07-11   
307-667 2 Rawlins WY   654   2024-01-08   
307-667 3 Rawlins WY   654   2024-03-02   
307-667 4 Rawlins WY   654   2024-04-05   

<< 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.ms

Like this site? We accept donations via PayPal.