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: 306

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-306 A Douglas WY CSPRWYDNIMD  495J STRATUS NETWORKS 654      
307-306 0 Douglas WY   450F ONVOY, LLC - WY 654   2021-07-11   
307-306 1 Douglas WY   495J STRATUS NETWORKS 654   2021-02-19   
307-306 2 Douglas WY   450F ONVOY, LLC - WY 654   2021-07-11   
307-306 3 Douglas WY   624H ONVOY SPECTRUM, LLC 654   2021-07-19   
307-306 4 Douglas WY   081F BANDWIDTH.COM CLEC, LLC - WY 654   2021-12-03   
307-306 5 Douglas WY   081F BANDWIDTH.COM CLEC, LLC - WY 654   2022-03-20   
307-306 6 Douglas WY   450F ONVOY, LLC - WY 654   2023-07-23   
307-306 7 Douglas WY   6529 T-MOBILE USA, INC. 654   2022-03-31   
307-306 8 Douglas WY   6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654   2022-11-04   
307-306 9 Douglas WY   081F BANDWIDTH.COM CLEC, LLC - WY 654   2022-02-26   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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