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.
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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
240-643 2 Washington Zone 3 MD   236   2003-03-24   
240-643 3 Washington Zone 3 MD   236   2003-04-07   
240-643 4 Washington Zone 3 MD   236   2003-04-07   
240-643 5 Washington Zone 3 MD   236   2003-04-07   
240-643 6 Washington Zone 3 MD   236      
240-643 7 Washington Zone 3 MD   236   2003-05-09   
240-643 8 Washington Zone 3 MD   236   2003-05-09   
240-643 9 Washington Zone 3 MD   236      
240-644 2 Washington Zone 2 MD   236   2004-06-04   
240-644 3 Washington Zone 2 MD   236   2004-07-16   
240-645 2 Washington Zone 3 MD   236   2005-08-23   
240-645 3 Washington Zone 3 MD   236   2005-08-23   
240-645 8 Washington Zone 3 MD   236   2005-09-15   
240-646 2 Laurel MD   236   2008-07-17   
240-651 9 Frederick MD   240   2014-03-23   
240-659 A Ashton MD   236   2019-03-30   
240-659 0 Ashton MD   236   2020-07-09   
240-659 3 Ashton MD   236   2019-09-20   
240-659 4 Ashton MD   236   2019-09-20   
240-659 5 Ashton MD   236   2019-09-20   
240-659 8 Ashton MD   236   2019-03-30   
240-659 9 Ashton MD   236   2019-03-30   
240-660 6 Washington Zone 10 MD   236   2016-02-06   
240-660 7 Washington Zone 10 MD   236   2016-02-06   
240-660 8 Washington Zone 10 MD   236   2016-02-06   
240-661 1 Lexington Park-Great Mills MD   236   2016-07-14   
240-661 3 Lexington Park-Great Mills MD   236   2020-05-08   
240-661 4 Lexington Park-Great Mills MD   236   2020-05-08   
240-663 A Middletown MD   240   2019-03-30   
240-663 0 Middletown MD   240   2019-09-13   
240-663 1 Middletown MD   240   2020-08-07   
240-663 9 Middletown MD   240   2019-03-30   
240-665 A Washington Zone 10 MD   236      
240-665 0 Washington Zone 10 MD   236   2017-04-06   
240-665 1 Washington Zone 10 MD   236   2017-04-06   
240-665 2 Washington Zone 10 MD   236   2018-12-07   
240-665 3 Washington Zone 10 MD   236   2019-11-08   
240-665 8 Washington Zone 10 MD   236   2017-03-11   
240-665 9 Washington Zone 10 MD   236   2017-03-11   
240-667 6 Washington Zone 4 MD   236   2012-11-16   
240-688 2 Washington Zone 3 MD   236   2006-09-13   
240-688 3 Washington Zone 3 MD   236   2006-09-12   
240-688 4 Washington Zone 3 MD   236   2006-09-12   
240-688 5 Washington Zone 3 MD   236   2006-10-08   
240-696 9 Washington Zone 4 MD   236   2013-02-11   
240-698 A Myersville MD   240   2019-12-13   
240-698 9 Myersville MD   240   2019-12-13   
240-708 0 Laurel (Baltimore LATA) MD   238   2013-07-22   
240-708 1 Laurel (Baltimore LATA) MD   238   2014-05-30   
240-708 2 Laurel (Baltimore LATA) MD   238   2014-05-30   

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

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