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.

Switch: CSPRWYESPS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
307-264 A Jackson WY 009E BRESNAN BROADBAND OF WYOMING, LLC - WY [CHARTER] 654      
307-315 A Casper WY 009E BRESNAN BROADBAND OF WYOMING, LLC - WY [CHARTER] 654      
307-337 A Casper WY 009E BRESNAN BROADBAND OF WYOMING, LLC - WY [CHARTER] 654      
307-373 A Greybull WY 009E BRESNAN BROADBAND OF WYOMING, LLC - WY [CHARTER] 654      
307-440 A Basin WY 009E BRESNAN BROADBAND OF WYOMING, LLC - WY [CHARTER] 654      

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

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