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: 210

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-210 A Southeast Sheridan WY CSPRWYMAXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 654      
307-210 0 Southeast Sheridan WY   145J TERRA NOVA TELECOM INC. 654   2025-07-14   
307-210 6 Southeast Sheridan WY CSPRWYMAXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 654   2022-09-06   
307-210 7 Southeast Sheridan WY CSPRWYMAXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 654   2022-09-06   
307-210 8 Southeast Sheridan WY CSPRWYMAXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 654   2020-06-04   
307-210 9 Southeast Sheridan WY CSPRWYMAXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 654   2020-06-04   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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