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: 978

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
660-978 A Pilot Grove MO KSCZMODR3MD  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 524      

Last updated: Sun, 17 May 2026 03:26:51 UTC

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