Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 307 [Rate centres in NPA 307] [Dial plan for NPA 307]

NXX: 289

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-289 A Cheyenne WY CHYNWYMAXTX  318J COMCAST IP PHONE, LLC 654      
307-289 0 Cheyenne WY   6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654   2023-07-06   
307-289 1 Cheyenne WY   318J COMCAST IP PHONE, LLC 654   2023-06-15   
307-289 2 Cheyenne WY   450F ONVOY, LLC - WY 654   2024-02-25   
307-289 3 Cheyenne WY   450F ONVOY, LLC - WY 654   2024-02-25   
307-289 4 Cheyenne WY   450F ONVOY, LLC - WY 654   2024-02-25   
307-289 5 Cheyenne WY   450F ONVOY, LLC - WY 654   2024-02-25   
307-289 6 Cheyenne WY   879G TELEPORT COMMUNICATIONS AMERICA WY-LLC 654   2023-08-12   
307-289 7 Cheyenne WY   450F ONVOY, LLC - WY 654   2024-10-04   
307-289 8 Cheyenne WY   450F ONVOY, LLC - WY 654   2023-07-23   
307-289 9 Cheyenne WY   6010 NEW CINGULAR WIRELESS PCS, LLC 654   2025-09-19   

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

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