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: 578

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-578 A Cody WY CODYWYMADS0  9636 QWEST CORPORATION 654      
307-578 0 Cody WY CODYWYMADS0  9636 QWEST CORPORATION 654      
307-578 1 Cody WY CODYWYMADS0  9636 QWEST CORPORATION 654      
307-578 2 Cody WY CODYWYMADS0  9636 QWEST CORPORATION 654      
307-578 3 Cody WY CODYWYMADS0  9636 QWEST CORPORATION 654      
307-578 4 Cody WY CODYWYMADS0  9636 QWEST CORPORATION 654      
307-578 5 Cody WY CODYWYMADS0  9636 QWEST CORPORATION 654      
307-578 6 Cody WY CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654   2013-04-18   
307-578 7 Cody WY CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654   2011-08-08   
307-578 8 Cody WY CSPRWYESPS1  009E BRESNAN BROADBAND OF WYOMING, LLC - WY [CHARTER] 654   2006-01-16   
307-578 9 Cody WY CHYNWYMAX9X  879G TELEPORT COMMUNICATIONS AMERICA WY-LLC 654   2015-02-02   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.