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
443-917 A Columbia MD   912D BROADVOX-CLEC, LLC - MD 238      
443-917 0 Columbia MD   082H LOCAL ACCESS LLC - MD 238   2013-09-06   
443-917 1 Columbia MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-14   
443-917 2 Columbia MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2013-01-30   
443-917 3 Columbia MD   876D ONVOY, LLC - MD 238   2012-02-29   
443-917 4 Columbia MD   4773 XO MARYLAND, LLC 238   2013-07-22   
443-917 5 Columbia MD   4773 XO MARYLAND, LLC 238   2013-07-22   
443-917 6 Columbia MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-14   
443-917 7 Columbia MD   7575 CENTURYLINK COMMUNICATIONS LLC 238   2013-10-01   
443-917 8 Columbia MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2015-02-14   
443-917 9 Columbia MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2015-02-14   

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.