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: 340

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-340 A Lusk WY CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-340 0 Lusk WY CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-340 1 Lusk WY CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-340 2 Lusk WY CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-340 3 Lusk WY CHYNWYMAEMD  9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654   2014-07-19   
307-340 4 Lusk WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2021-03-02   
307-340 5 Lusk WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2021-03-02   
307-340 6 Lusk WY CHYNWYRF2MD  939H COMMIO, LLC 654   2023-12-23   
307-340 7 Lusk WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2023-06-18   
307-340 9 Lusk WY CHYNWYMAXDX  073H TELNYX LLC 654   2021-07-04   

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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