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: 410

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-410 A Powell WY CSPRWYMAXEX  6529 T-MOBILE USA, INC. 654      
307-410 0 Powell WY   6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654   2023-10-10   
307-410 1 Powell WY   450F ONVOY, LLC - WY 654   2023-10-28   
307-410 2 Powell WY   450F ONVOY, LLC - WY 654   2023-10-28   
307-410 3 Powell WY   450F ONVOY, LLC - WY 654   2024-07-08   
307-410 4 Powell WY   450F ONVOY, LLC - WY 654   2024-03-08   
307-410 5 Powell WY   6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654   2024-09-28   
307-410 6 Powell WY   450F ONVOY, LLC - WY 654   2024-10-04   
307-410 7 Powell WY   450F ONVOY, LLC - WY 654   2025-02-02   
307-410 8 Powell WY   450F ONVOY, LLC - WY 654   2023-07-23   
307-410 9 Powell WY   6529 T-MOBILE USA, INC. 654   2022-05-22   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.