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: 551

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-551 A Annapolis MD   876D ONVOY, LLC - MD 238   2026-08-29   
667-551 0 Annapolis MD   876D ONVOY, LLC - MD 238   2026-08-29   
667-551 1 Annapolis MD   876D ONVOY, LLC - MD 238   2026-08-29   
667-551 2 Annapolis MD   876D ONVOY, LLC - MD 238   2026-08-29   
667-551 3 Annapolis MD   876D ONVOY, LLC - MD 238   2026-08-29   
667-551 4 Annapolis MD   876D ONVOY, LLC - MD 238   2026-08-29   
667-551 5 Annapolis MD   876D ONVOY, LLC - MD 238   2026-08-29   

Last updated: Fri, 10 Jul 2026 02:55:48 UTC

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