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: 687

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
660-687 A Knobnoster MO KNNSMOLORPB  9533 SOUTHWESTERN BELL 524      
660-687 0 Knobnoster MO   792K CHARTER IP ENABLED SERVICES, LLC 524   2007-08-26   
660-687 1 Knobnoster MO   9533 SOUTHWESTERN BELL 524      
660-687 2 Knobnoster MO   9533 SOUTHWESTERN BELL 524      
660-687 3 Knobnoster MO   9533 SOUTHWESTERN BELL 524      
660-687 4 Knobnoster MO   9533 SOUTHWESTERN BELL 524      
660-687 5 Knobnoster MO   9533 SOUTHWESTERN BELL 524      
660-687 6 Knobnoster MO   9533 SOUTHWESTERN BELL 524      
660-687 7 Knobnoster MO   9533 SOUTHWESTERN BELL 524      
660-687 8 Knobnoster MO   9533 SOUTHWESTERN BELL 524      
660-687 9 Knobnoster MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 524   2009-02-26   

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

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