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: 479

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-479 A Ellicott City MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-05-12   
667-479 0 Ellicott City MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-05-12   
667-479 1 Ellicott City MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-05-12   
667-479 2 Ellicott City MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2025-08-01   
667-479 9 Ellicott City MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-12-14   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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