Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
406-659 5 North Parkman MT 624H ONVOY SPECTRUM, LLC 654   2021-11-14   
406-840 1 Silvertip MT 624H ONVOY SPECTRUM, LLC 654   2021-11-14   
406-840 2 Silvertip MT 624H ONVOY SPECTRUM, LLC 654   2021-11-14   
406-840 3 Silvertip MT 624H ONVOY SPECTRUM, LLC 654   2021-07-19   
435-281 4 Coalville UT 624H ONVOY SPECTRUM, LLC 660   2021-07-19   
435-281 7 Coalville UT 624H ONVOY SPECTRUM, LLC 660   2021-11-20   
435-281 8 Coalville UT 624H ONVOY SPECTRUM, LLC 660   2021-11-20   
970-780 A South Laramie CO 624H ONVOY SPECTRUM, LLC 654      
970-780 5 South Laramie CO 624H ONVOY SPECTRUM, LLC 654   2021-08-23   
970-780 7 South Laramie CO 624H ONVOY SPECTRUM, LLC 654   2021-11-07   
970-780 8 South Laramie CO 624H ONVOY SPECTRUM, LLC 654   2021-11-07   
970-802 A South Cheyenne CO 624H ONVOY SPECTRUM, LLC 654      
970-802 3 South Cheyenne CO 624H ONVOY SPECTRUM, LLC 654   2021-11-07   
970-802 4 South Cheyenne CO 624H ONVOY SPECTRUM, LLC 654   2021-11-07   
970-802 7 South Cheyenne CO 624H ONVOY SPECTRUM, LLC 654   2021-08-23   

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Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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