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: 764

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-764 A Glen Burnie MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238      
443-764 0 Glen Burnie MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2010-09-05   
443-764 1 Glen Burnie MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2010-09-05   
443-764 2 Glen Burnie MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238   2010-07-15   
443-764 3 Glen Burnie MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2010-06-18   
443-764 4 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-09-02   
443-764 5 Glen Burnie MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2010-11-07   
443-764 6 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-11-16   
443-764 7 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-09-12   
443-764 8 Glen Burnie MD   876D ONVOY, LLC - MD 238   2012-10-07   
443-764 9 Glen Burnie MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2009-07-13   

Last updated: Fri, 01 Jul 2022 02:53:40 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.