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: 393

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-393 A Evanston WY CHYNWYRFDS0  581H AIRUS, INC. - WY 654      
307-393 0 Evanston WY   450F ONVOY, LLC - WY 654   2021-07-11   
307-393 1 Evanston WY   581H AIRUS, INC. - WY 654   2021-05-22   
307-393 2 Evanston WY   450F ONVOY, LLC - WY 654   2021-07-11   
307-393 3 Evanston WY   450F ONVOY, LLC - WY 654   2023-10-28   
307-393 4 Evanston WY   450F ONVOY, LLC - WY 654   2023-10-28   
307-393 5 Evanston WY   450F ONVOY, LLC - WY 654   2023-10-28   
307-393 6 Evanston WY   624H ONVOY SPECTRUM, LLC 654   2021-07-19   
307-393 7 Evanston WY   450F ONVOY, LLC - WY 654   2023-07-23   
307-393 8 Evanston WY   624H ONVOY SPECTRUM, LLC 654   2021-11-26   
307-393 9 Evanston WY   624H ONVOY SPECTRUM, LLC 654   2021-11-26   

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

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