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: 691

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
660-691 A Clarence MO KSCZMODR3MD  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 524      
660-691 0 Clarence MO KSCYMO55DSG  225F PEERLESS NETWORK OF MISSOURI, LLC - MO 524   2014-04-10   
660-691 4 Clarence MO KSCZMODR3MD  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 524   2021-10-03   
660-691 7 Clarence MO KSCAMO961MD  508J CENTURYLINK COMMUNICATIONS, LLC 524   2013-10-28   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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