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
443-212 A Sparks-Glencoe MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-212 1 Sparks-Glencoe MD   2589 US LEC OF MARYLAND, INC. 238   2003-03-29   
443-212 4 Sparks-Glencoe MD   4716 PAETEC COMMUNICATIONS, INC. - MD 238   2004-09-28   
443-212 5 Sparks-Glencoe MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2005-03-10   
443-212 6 Sparks-Glencoe MD   8864 BROADWING COMMUNICATIONS. LLC - MD 238   2006-06-03   
443-212 7 Sparks-Glencoe MD   7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 238   2008-07-01   
443-212 8 Sparks-Glencoe MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-02-22   

Last updated: Thu, 10 Sep 2020 02:15:24 UTC

Sponsored by: VoiceMeUp - Corporate VoIP Services

Like this site? We accept donations via PayPal.