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: CSPRWYESPS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
307-373 A Greybull WY 009E BRESNAN BROADBAND OF WYOMING, LLC - WY [CHARTER] 654      
307-373 2 Greybull WY 009E BRESNAN BROADBAND OF WYOMING, LLC - WY [CHARTER] 654   2009-08-09   
307-440 A Basin WY 009E BRESNAN BROADBAND OF WYOMING, LLC - WY [CHARTER] 654      
307-440 2 Basin WY 009E BRESNAN BROADBAND OF WYOMING, LLC - WY [CHARTER] 654   2009-08-09   

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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