Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Bel Air, MD

<< 1 2 3 4

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
667-336 7   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-336 8   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-07-23   
667-336 9   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2019-01-19   
667-454 A BLTMMDCHXQX  197D VONAGE AMERICA LLC 238      
667-454 0   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2023-12-09   
667-454 1   876D ONVOY, LLC - MD 238   2024-02-29   
667-454 2   197D VONAGE AMERICA LLC 238   2023-12-08   
667-454 3   876D ONVOY, LLC - MD 238   2024-02-29   
667-454 4   876D ONVOY, LLC - MD 238   2024-02-29   
667-454 5   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2024-02-23   
667-454 6   939H COMMIO, LLC 238   2023-12-28   
667-454 7   939H COMMIO, LLC 238   2023-12-28   
667-454 8   939H COMMIO, LLC 238   2023-12-28   
667-454 9   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2023-12-15   
667-469 A BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-04-04   
667-469 0   876D ONVOY, LLC - MD 238   2024-04-04   
667-469 1   876D ONVOY, LLC - MD 238   2024-04-04   
667-469 3   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-08-02   
667-469 4   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-12-24   
667-469 5   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-12-24   
667-469 6   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-10-16   
667-469 7   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-09-29   
667-469 8   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-11-20   
667-469 9   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-11-20   
667-925 A BLTQMD01BMD  469J CORETEL MARYLAND, INC. - MD 238      
667-925 0   071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-09-16   
667-925 1   071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-09-16   
667-925 2   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2023-02-12   
667-925 3   876D ONVOY, LLC - MD 238   2023-08-10   
667-925 4   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2022-09-09   
667-925 5   469J CORETEL MARYLAND, INC. - MD 238   2021-11-14   
667-925 6   876D ONVOY, LLC - MD 238   2022-04-25   
667-925 7   876D ONVOY, LLC - MD 238   2023-08-10   
667-925 8   876D ONVOY, LLC - MD 238   2023-08-10   
667-925 9   073H TELNYX LLC 238   2023-07-13   

<< 1 2 3 4

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.