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: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-219 A Parkville MD BLTMMDSNRS0  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-219 0 Parkville MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-219 1 Parkville MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-219 2 Parkville MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-01-13   
443-219 3 Parkville MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-02-10   
443-219 4 Parkville MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2003-02-20   
443-219 5 Parkville MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2012-03-10   
443-219 6 Parkville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2012-10-12   
443-219 7 Parkville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2013-04-22   
443-219 8 Parkville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2013-04-22   
443-219 9 Parkville MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      

Last updated: Tue, 31 Dec 2019 02:37:20 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.