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: 556

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-556 A Riverton WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654      
307-556 0 Riverton WY CHYNWYRF2MD  939H COMMIO, LLC 654      
307-556 1 Riverton WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654      
307-556 2 Riverton WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654      
307-556 3 Riverton WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654      
307-556 4 Riverton WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654      
307-556 5 Riverton WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654      
307-556 6 Riverton WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654      
307-556 7 Riverton WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654      
307-556 8 Riverton WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654      
307-556 9 Riverton WY CSPRWYMAXEX  6529 T-MOBILE USA, INC. 654      

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.