Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 307 [Rate centres in NPA 307] [Dial plan for NPA 307]

NXX: 224

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-224 A Casper WY CHYNWYMAEMD  9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-224 0 Casper WY CHYNWYMAEMD  9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-224 1 Casper WY CHYNWYMAEMD  9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-224 2 Casper WY CHYNWYMAQMD  081F BANDWIDTH.COM CLEC, LLC - WY 654   2012-08-19   
307-224 3 Casper WY CHYNWYMAEMD  9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654   2014-08-28   
307-224 4 Casper WY CHYNWYMAEMD  9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-224 5 Casper WY BASNWYXCDS1  7466 TRI TEL, INC. 654   2010-02-19   
307-224 6 Casper WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2012-12-13   
307-224 7 Casper WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2011-05-19   
307-224 8 Casper WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2012-12-13   
307-224 9 Casper WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2012-12-13   

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

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