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: 243

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-243 A Oxford MD ESTNMDBNGT0  2593 CORE COMMUNICATIONS, INC.- MD 242      
667-243 0 Oxford MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2018-07-26   
667-243 1 Oxford MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2018-07-26   
667-243 2 Oxford MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2018-09-13   
667-243 3 Oxford MD ESTNMDBNGT0  2593 CORE COMMUNICATIONS, INC.- MD 242   2019-03-29   
667-243 4 Oxford MD SLBRMD90DS0  2593 CORE COMMUNICATIONS, INC.- MD 242   2019-07-31   
667-243 5 Oxford MD ESTNMDBNGT0  2593 CORE COMMUNICATIONS, INC.- MD 242   2019-03-29   
667-243 6 Oxford MD ESTNMDBNGT0  2593 CORE COMMUNICATIONS, INC.- MD 242   2019-03-29   
667-243 7 Oxford MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2018-07-26   
667-243 8 Oxford MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2019-03-04   
667-243 9 Oxford MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2019-03-04   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.