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: 487

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-487 A Gillette WY CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-487 0 Gillette WY   6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654   2018-11-23   
307-487 1 Gillette WY   581H AIRUS, INC. - WY 654   2020-08-06   
307-487 2 Gillette WY   9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654   2020-06-28   
307-487 3 Gillette WY   450F ONVOY, LLC - WY 654   2021-07-11   
307-487 4 Gillette WY   450F ONVOY, LLC - WY 654   2019-09-07   
307-487 5 Gillette WY   450F ONVOY, LLC - WY 654   2020-12-19   
307-487 6 Gillette WY   450F ONVOY, LLC - WY 654   2020-12-19   
307-487 7 Gillette WY   081F BANDWIDTH.COM CLEC, LLC - WY 654   2022-01-11   
307-487 8 Gillette WY   450F ONVOY, LLC - WY 654   2023-06-18   
307-487 9 Gillette WY   450F ONVOY, LLC - WY 654   2023-06-25   

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.