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: 674

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
660-674 A Alma MO HNVIMOXADS0  1860 ALMA COMMUNICATIONS COMPANY DBA ALMA TELEPHONE CO 524      

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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