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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OCN: 7466 TRI TEL, INC.

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
307-224 5 Casper WY BASNWYXCDS1  654   2010-02-19   
307-359 4 Douglas WY BASNWYXCDS1  654   2010-02-19   
307-586 A Cody WY BASNWYXCDS1  654      
307-620 4 Buffalo WY BASNWYXCDS1  654   2010-02-19   
307-655 4 Sheridan WY BASNWYXCDS1  654   2010-02-19   
307-696 8 Gillette WY BASNWYXCDS1  654   2010-02-19   
307-764 A Powell WY BASNWYXCDS1  654      

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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