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
443-747 A Port Deposit MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC. - MD 238      
443-747 0 Port Deposit MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2004-04-02   
443-747 1 Port Deposit MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-06-18   
443-747 2 Port Deposit MD   2589 US LEC OF MARYLAND, INC. 238   2004-02-05   
443-747 3 Port Deposit MD   2593 CORE COMMUNICATIONS, INC. - MD 238      
443-747 4 Port Deposit MD   228C IDT AMERICA CORP - MD 238   2012-01-08   
443-747 5 Port Deposit MD   8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2006-05-04   
443-747 6 Port Deposit MD   530H WIDE VOICE, LLC - MD 238   2016-05-14   
443-747 7 Port Deposit MD   876D ONVOY, LLC - MD 238   2012-10-08   
443-747 8 Port Deposit MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-747 9 Port Deposit MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   

Last updated: Sat, 11 Jul 2020 20:37:26 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.