Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 660 [Rate centres in NPA 660] [Dial plan for NPA 660]

NXX: 303

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
660-303 A Lancaster MO KSCYMO55XXX  093F ONVOY, LLC - MO 524      
660-303 0 Lancaster MO   225F PEERLESS NETWORK OF MISSOURI, LLC - MO 524   2016-02-13   
660-303 1 Lancaster MO   093F ONVOY, LLC - MO 524   2023-09-10   
660-303 2 Lancaster MO   093F ONVOY, LLC - MO 524   2021-07-23   
660-303 4 Lancaster MO   516C AT&T CORP. 524   2024-10-07   
660-303 6 Lancaster MO   093F ONVOY, LLC - MO 524   2021-01-06   
660-303 7 Lancaster MO   4932 LEVEL 3 COMMUNICATIONS, LLC - MO 524   2014-05-07   
660-303 8 Lancaster MO   073H TELNYX LLC 524   2019-09-30   
660-303 9 Lancaster MO   624H ONVOY SPECTRUM, LLC 524   2025-01-12   

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

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