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: 671

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-671 A New Windsor MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-671 0 New Windsor MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-671 1 New Windsor MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-671 2 New Windsor MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-671 4 New Windsor MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-671 5 New Windsor MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238      
443-671 6 New Windsor MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-671 7 New Windsor MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-671 8 New Windsor MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-671 9 New Windsor MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.