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: 370E YMAX COMMUNICATIONS CORP. - WY

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
307-212 9 Rock Springs WY CHYNWYMAX4X  654      
307-223 7 Laramie WY CHYNWYMAX4X  654      
307-343 4 Laramie WY CHYNWYMAX4X  654      
307-529 A Cheyenne WY CHYNWYMAX4X  654      
307-529 0 Cheyenne WY CHYNWYMAX4X  654      
307-529 3 Cheyenne WY CHYNWYMAX4X  654      
307-922 8 Rock Springs WY CHYNWYMAX4X  654      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.