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: 718

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-718 A Columbia MD CLMAMDJTBMD  2589 US LEC OF MARYLAND, INC. 238      
443-718 0 Columbia MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-02-19   
443-718 1 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-07-12   
443-718 2 Columbia MD CLMAMDJTBMD  2589 US LEC OF MARYLAND, INC. 238   2008-05-10   
443-718 3 Columbia MD CLMAMDJTBMD  2589 US LEC OF MARYLAND, INC. 238   2008-05-10   
443-718 4 Columbia MD CLMAMDJTBMD  2589 US LEC OF MARYLAND, INC. 238   2008-06-16   
443-718 5 Columbia MD CLMAMDJTBMD  2589 US LEC OF MARYLAND, INC. 238   2008-06-16   
443-718 6 Columbia MD PIVLMDPKFMD  9170 BROADVIEW NETWORKS, INC. - MD 238   2008-09-25   
443-718 7 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-07-12   
443-718 8 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-04-02   
443-718 9 Columbia MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.