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.

OCN: 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
443-813 4 Baltimore MD   238   2008-02-04   
443-813 5 Baltimore MD   238   2008-02-04   
443-813 6 Baltimore MD   238   2008-02-11   
443-813 7 Baltimore MD   238   2008-02-11   
443-813 8 Baltimore MD   238   2008-02-11   
443-813 9 Baltimore MD   238   2008-04-08   
443-815 1 Essex MD   238   2014-11-08   
443-815 8 Essex MD   238   2014-10-10   
443-815 9 Essex MD   238   2014-11-08   
443-819 A Bel Air MD   238      
443-819 6 Bel Air MD   238   2015-10-09   
443-819 7 Bel Air MD   238   2015-10-09   
443-819 8 Bel Air MD   238   2015-03-21   
443-819 9 Bel Air MD   238   2015-03-21   
443-824 A Towson MD BLTMMDCH40Z  238      
443-824 0 Towson MD   238      
443-824 2 Towson MD   238      
443-824 3 Towson MD   238      
443-824 4 Towson MD   238      
443-824 6 Towson MD   238      
443-824 9 Towson MD   238      
443-825 A Baltimore MD BLTMMDCH40Z  238   2007-01-20   
443-825 0 Baltimore MD   238   2007-04-08   
443-825 1 Baltimore MD   238   2007-04-08   
443-825 2 Baltimore MD   238   2007-04-23   
443-825 5 Baltimore MD   238   2007-01-20   
443-825 6 Baltimore MD   238   2007-01-20   
443-825 7 Baltimore MD   238   2007-01-20   
443-825 8 Baltimore MD   238   2007-01-20   
443-825 9 Baltimore MD   238   2007-01-20   
443-839 A Baltimore MD BLTMMDCH40Z  238   2006-06-08   
443-839 2 Baltimore MD   238   2006-07-09   
443-839 3 Baltimore MD   238   2006-07-09   
443-839 4 Baltimore MD   238   2006-06-08   
443-839 5 Baltimore MD   238   2006-06-08   
443-839 6 Baltimore MD   238   2006-06-08   
443-839 7 Baltimore MD   238   2006-06-08   
443-839 8 Baltimore MD   238   2008-04-08   
443-839 9 Baltimore MD   238   2006-06-08   
443-847 4 Towson MD   238   2007-03-11   
443-850 A Baltimore MD BLTMMDCH40Z  238      
443-851 A Catonsville MD BLTMMDCH40Z  238      
443-851 0 Catonsville MD   238      
443-851 1 Catonsville MD   238      
443-851 3 Catonsville MD   238      
443-851 6 Catonsville MD   238      
443-851 9 Catonsville MD   238      
443-854 A Baltimore MD BLTMMDCH40Z  238      
443-857 A Baltimore MD BLTMMDCH40Z  238      
443-858 A Baltimore MD BLTMMDCH40Z  238      

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Last updated: Thu, 10 Sep 2020 02:15:24 UTC

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