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: 441

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-441 A Casper WY CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-441 0 Casper WY CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-441 1 Casper WY CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-441 2 Casper WY CHYNWY07LMD  5562 METROPCS, INC. 654      
307-441 3 Casper WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654      
307-441 4 Casper WY CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-441 5 Casper WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654      
307-441 6 Casper WY CHYNWYMAX9X  879G TELEPORT COMMUNICATIONS AMERICA WY-LLC 654      
307-441 7 Casper WY CSPRWYMAXEX  6529 T-MOBILE USA, INC. 654      
307-441 8 Casper WY CSPRWYMAXEX  6529 T-MOBILE USA, INC. 654      
307-441 9 Casper WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654      

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.