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: 443

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-443 A Cheyenne WY CHYNWYRF2MD  939H COMMIO, LLC 654      
307-443 3 Cheyenne WY CHYNWYRF2MD  939H COMMIO, LLC 654   2019-08-17   
307-443 4 Cheyenne WY CHYNWYMAXGX  624H ONVOY SPECTRUM, LLC 654   2024-10-23   
307-443 5 Cheyenne WY CHYNWYMAXGX  624H ONVOY SPECTRUM, LLC 654   2024-10-23   
307-443 6 Cheyenne WY CHYNWYMAXGX  624H ONVOY SPECTRUM, LLC 654   2024-10-23   

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

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