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: 370

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-370 A Rawlins WY CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-370 0 Rawlins WY CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-370 1 Rawlins WY CHYNWYMAQMD  081F BANDWIDTH.COM CLEC, LLC - WY 654   2010-09-09   
307-370 2 Rawlins WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2012-12-13   
307-370 3 Rawlins WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2012-12-13   
307-370 4 Rawlins WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2012-12-13   
307-370 5 Rawlins WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2012-12-13   
307-370 6 Rawlins WY CHYNWYMAX9X  879G TELEPORT COMMUNICATIONS AMERICA WY-LLC 654   2020-10-26   
307-370 7 Rawlins WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2011-06-05   
307-370 8 Rawlins WY CHYNWYRFDS0  581H AIRUS, INC. - WY 654   2018-02-26   
307-370 9 Rawlins WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2020-12-19   

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.