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: 423

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-423 A Annapolis MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
667-423 0 Annapolis MD   876D ONVOY, LLC - MD 238   2024-02-19   
667-423 1 Annapolis MD   876D ONVOY, LLC - MD 238   2024-02-19   
667-423 2 Annapolis MD   876D ONVOY, LLC - MD 238   2024-02-19   
667-423 5 Annapolis MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2023-06-16   
667-423 6 Annapolis MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2023-02-23   
667-423 7 Annapolis MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2023-02-23   
667-423 8 Annapolis MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2023-02-23   
667-423 9 Annapolis MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2023-02-20   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.