Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 816 [Rate centres in NPA 816] [Dial plan for NPA 816]

NXX: 684

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
816-684 A Helena MO KSCYMO55XXX  093F ONVOY, LLC - MO 524      
816-684 2 Helena MO KSCZMODR3MD  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 524   2017-05-15   
816-684 3 Helena MO KSCYMO55XXX  093F ONVOY, LLC - MO 524   2021-03-06   
816-684 6 Helena MO KSCYMO55XXX  093F ONVOY, LLC - MO 524   2018-11-26   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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