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: 572

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-572 A Glen Burnie MD GLBRMDGLDS0  9212 VERIZON MARYLAND, INC. 238      
443-572 0 Glen Burnie MD GLBRMDGLDS0  9212 VERIZON MARYLAND, INC. 238      
443-572 1 Glen Burnie MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2007-01-15   
443-572 2 Glen Burnie MD BLTMMDCHFMD  5562 METROPCS, INC. 238   2016-10-01   
443-572 3 Glen Burnie MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-09-04   
443-572 4 Glen Burnie MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-02-29   
443-572 5 Glen Burnie MD GLBRMDGLDS0  9212 VERIZON MARYLAND, INC. 238      
443-572 6 Glen Burnie MD BLTMMDCH40Z  6664 SPRINT SPECTRUM, L.P. 238   2005-07-02   
443-572 7 Glen Burnie MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
443-572 8 Glen Burnie MD GLBRMDGLDS0  9212 VERIZON MARYLAND, INC. 238      
443-572 9 Glen Burnie MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2007-08-17   

Last updated: Wed, 01 Jun 2022 03:09:23 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.