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
443-572 9 Glen Burnie MD   238   2007-08-17   
443-577 8 Glen Burnie MD   238   2016-07-14   
443-579 6 Essex MD   238   2008-07-17   
443-581 8 Chase MD   238   2019-07-06   
443-583 9 Columbia MD   238   2014-11-08   
443-596 1 Essex MD   238   2020-04-06   
443-600 A Essex MD BLTMMDCH40Z  238      
443-600 0 Essex MD   238      
443-600 1 Essex MD   238      
443-600 2 Essex MD   238   2005-04-15   
443-600 3 Essex MD   238   2005-08-13   
443-600 4 Essex MD   238   2005-10-09   
443-600 5 Essex MD   238   2006-01-21   
443-600 6 Essex MD   238      
443-600 7 Essex MD   238   2006-03-30   
443-600 8 Essex MD   238   2006-05-06   
443-600 9 Essex MD   238      
443-616 1 Bel Air MD   238   2007-03-11   
443-616 4 Bel Air MD   238   2003-01-21   
443-616 5 Bel Air MD   238   2003-01-21   
443-616 6 Bel Air MD   238   2003-01-21   
443-616 7 Bel Air MD   238   2003-01-21   
443-616 8 Bel Air MD   238   2003-01-21   
443-616 9 Bel Air MD   238   2003-01-21   
443-626 7 Chase MD   238   2014-09-22   
443-627 0 Baltimore MD   238   2007-02-08   
443-627 1 Baltimore MD   238   2007-02-08   
443-627 3 Baltimore MD   238   2007-02-08   
443-630 1 Baltimore MD   238   2008-08-18   
443-630 2 Baltimore MD   238   2008-08-18   
443-630 7 Baltimore MD   238   2008-10-12   
443-630 8 Baltimore MD   238   2008-10-12   
443-636 A Catonsville MD BLTMMDCH40Z  238      
443-636 0 Catonsville MD   238   2008-03-31   
443-636 1 Catonsville MD   238   2007-05-30   
443-636 7 Catonsville MD   238   2008-07-17   
443-640 8 Bel Air MD   238   2008-04-21   
443-642 1 Baltimore MD   238   2007-03-11   
443-642 7 Baltimore MD   238   2007-03-24   
443-642 8 Baltimore MD   238   2007-03-24   
443-642 9 Baltimore MD   238   2007-03-24   
443-648 6 Essex MD   238   2015-04-12   
443-652 A Towson MD   238      
443-652 0 Towson MD   238   2016-07-14   
443-652 2 Towson MD   238   2007-06-16   
443-652 7 Towson MD   238   2018-09-20   
443-653 A Parkville MD BLTMMDCH40Z  238      
443-653 0 Parkville MD   238      
443-653 1 Parkville MD   238      
443-653 2 Parkville MD   238      

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

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