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: 570

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-570 A Baltimore MD   5562 METROPCS, INC. 238   2026-10-22   
667-570 0 Baltimore MD   876D ONVOY, LLC - MD 238   2026-10-23   
667-570 5 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2026-10-23   
667-570 6 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2026-10-23   
667-570 7 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2026-10-23   
667-570 8 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2026-10-23   
667-570 9 Baltimore MD   5562 METROPCS, INC. 238   2026-10-22   

Last updated: Tue, 29 Sep 2026 03:00:13 UTC

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