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.
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Switch: CHYNWYJLPS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
307-225 A Laramie WY 009E BRESNAN BROADBAND OF WYOMING, LLC - WY [CHARTER] 654      
307-369 A Cheyenne WY 009E BRESNAN BROADBAND OF WYOMING, LLC - WY [CHARTER] 654      
307-426 A Cheyenne WY 009E BRESNAN BROADBAND OF WYOMING, LLC - WY [CHARTER] 654      
307-514 A Cheyenne WY 009E BRESNAN BROADBAND OF WYOMING, LLC - WY [CHARTER] 654      

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

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