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: 384

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-384 A Afton WY CHYNWYRF2MD  939H COMMIO, LLC 654      
307-384 0 Afton WY CHYNWYRF2MD  939H COMMIO, LLC 654   2022-01-02   
307-384 1 Afton WY CHYNWYRF2MD  939H COMMIO, LLC 654   2022-01-02   
307-384 2 Afton WY   6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654   2024-04-08   
307-384 5 Afton WY   6010 NEW CINGULAR WIRELESS PCS, LLC 654   2024-04-23   
307-384 6 Afton WY CHYNWYRF2MD  939H COMMIO, LLC 654   2023-12-23   
307-384 7 Afton WY CHYNWYRF2MD  939H COMMIO, LLC 654   2023-12-23   
307-384 8 Afton WY CHYNWYMAEMD  9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654   2023-01-27   
307-384 9 Afton WY CHYNWYRF2MD  939H COMMIO, LLC 654   2023-12-23   

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.