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: 345

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-345 A Catonsville MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
667-345 0 Catonsville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-07-26   
667-345 1 Catonsville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-07-26   
667-345 2 Catonsville MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-11-21   
667-345 3 Catonsville MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2021-07-09   
667-345 4 Catonsville MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2021-07-09   
667-345 5 Catonsville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-05-21   
667-345 6 Catonsville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-07-26   
667-345 7 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-11-08   
667-345 8 Catonsville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-04-29   
667-345 9 Catonsville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-04-29   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.