Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

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 8 Lusk WY   145J TERRA NOVA TELECOM INC. 654   2022-08-03   
307-340 9 Lusk WY CHYNWYMAXDX  073H TELNYX LLC 654   2021-07-04   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.