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: 517

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-517 A Catonsville MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2024-12-23   
667-517 0 Catonsville MD   820C INTRADO COMMUNICATIONS, LLC 238   2026-10-15   
667-517 2 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2026-10-16   
667-517 3 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2026-10-16   
667-517 4 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2026-10-16   
667-517 5 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2026-10-16   
667-517 6 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2026-10-16   
667-517 7 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2026-10-16   
667-517 8 Catonsville MD   876D ONVOY, LLC - MD 238   2026-08-15   
667-517 9 Catonsville MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2024-12-23   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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