Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 667 [Rate centres in NPA 667] [Dial plan for NPA 667]

NXX: 538

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-538 A Churchville MD   876D ONVOY, LLC - MD 238   2026-03-20   
667-538 0 Churchville MD   876D ONVOY, LLC - MD 238   2026-03-20   

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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