Local Calling Guide

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NPA: 307 [Rate centres in NPA 307] [Dial plan for NPA 307]

NXX: 333

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-333 A Casper WY CHYNWYJLAMD  732J NUSO, LLC 654      
307-333 0 Casper WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2006-07-13   
307-333 1 Casper WY CSPRWYESPS1  009E BRESNAN BROADBAND OF WYOMING, LLC - WY [CHARTER] 654   2006-09-29   
307-333 2 Casper WY CSPRWYESPS1  009E BRESNAN BROADBAND OF WYOMING, LLC - WY [CHARTER] 654   2007-12-06   
307-333 3 Casper WY CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654   2010-03-11   
307-333 4 Casper WY CSPRWYESPS1  009E BRESNAN BROADBAND OF WYOMING, LLC - WY [CHARTER] 654   2006-01-27   
307-333 5 Casper WY CSPRWYESPS1  009E BRESNAN BROADBAND OF WYOMING, LLC - WY [CHARTER] 654   2005-07-29   
307-333 6 Casper WY CSPRWYESPS1  009E BRESNAN BROADBAND OF WYOMING, LLC - WY [CHARTER] 654   2013-10-14   
307-333 7 Casper WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2008-08-29   
307-333 8 Casper WY CHYNWYJLAMD  732J NUSO, LLC 654   2023-07-09   
307-333 9 Casper WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2023-10-12   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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