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
443-606 A Fork MD   2697 CTC COMMUNICATIONS CORP. - MD 238      
443-606 0 Fork MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-10-18   
443-606 1 Fork MD   2697 CTC COMMUNICATIONS CORP. - MD 238      
443-606 2 Fork MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-10-18   
443-606 3 Fork MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-10-18   
443-606 4 Fork MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-10-18   
443-606 5 Fork MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-06-16   
443-606 6 Fork MD   876D ONVOY, LLC - MD 238   2015-11-27   
443-606 7 Fork MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-10-22   
443-606 8 Fork MD   073H TELNYX LLC 238   2017-04-25   
443-606 9 Fork MD   082H LOCAL ACCESS LLC - MD 238   2015-03-21   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.