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: 621

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-621 A Buffalo WY CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-621 0 Buffalo WY CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-621 1 Buffalo WY CSPRWYMAXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 654      
307-621 2 Buffalo WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654      
307-621 3 Buffalo WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654      
307-621 4 Buffalo WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654      
307-621 5 Buffalo WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654      
307-621 6 Buffalo WY CHYNWYMAX9X  879G TELEPORT COMMUNICATIONS AMERICA WY-LLC 654      
307-621 7 Buffalo WY CSPRWYMAXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 654      
307-621 8 Buffalo WY CHYNWYRF1MD  073H TELNYX LLC 654      
307-621 9 Buffalo WY CHYNWYRFDS0  581H AIRUS, INC. - WY 654      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.