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: 238

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-238 A Hamilton Dome WY CSPRWYMAXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 654      
307-238 6 Hamilton Dome WY CSPRWYMAXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 654   2017-10-06   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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