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.

NPA: 667 [Rate centres in NPA 667] [Dial plan for NPA 667]

NXX: 454

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-454 A Bel Air MD BLTMMDCHXQX  197D VONAGE AMERICA LLC 238      
667-454 0 Bel Air MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2023-12-09   
667-454 1 Bel Air MD   876D ONVOY, LLC - MD 238   2024-02-29   
667-454 2 Bel Air MD   197D VONAGE AMERICA LLC 238   2023-12-08   
667-454 3 Bel Air MD   876D ONVOY, LLC - MD 238   2024-02-29   
667-454 4 Bel Air MD   876D ONVOY, LLC - MD 238   2024-02-29   
667-454 5 Bel Air MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2024-02-23   
667-454 6 Bel Air MD   939H COMMIO, LLC 238   2023-12-28   
667-454 7 Bel Air MD   939H COMMIO, LLC 238   2023-12-28   
667-454 8 Bel Air MD   939H COMMIO, LLC 238   2023-12-28   
667-454 9 Bel Air MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2023-12-15   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.