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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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
301-238 4 Washington Zone 16 MD 829J PAETEC ITEL, LLC 236   2005-02-08   
301-238 5 Washington Zone 16 MD 829J PAETEC ITEL, LLC 236   2007-02-23   
301-242 5 Brandywine MD 829J PAETEC ITEL, LLC 236   2003-03-01   
301-244 A Washington Zone 3 MD 829J PAETEC ITEL, LLC 236   2025-04-02   
301-244 3 Washington Zone 3 MD 829J PAETEC ITEL, LLC 236   2011-04-28   
301-244 4 Washington Zone 3 MD 829J PAETEC ITEL, LLC 236   2006-02-24   
301-244 6 Washington Zone 3 MD 829J PAETEC ITEL, LLC 236   2006-02-24   
301-244 7 Washington Zone 3 MD 829J PAETEC ITEL, LLC 236   2006-02-24   
301-274 7 Hughesville MD 829J PAETEC ITEL, LLC 236   2011-01-28   
301-274 8 Hughesville MD 829J PAETEC ITEL, LLC 236   2004-03-27   
301-276 3 Washington Zone 4 MD 829J PAETEC ITEL, LLC 236   2007-02-22   
301-276 8 Washington Zone 4 MD 829J PAETEC ITEL, LLC 236   2007-11-06   
301-281 8 Washington Zone 6 MD 829J PAETEC ITEL, LLC 236   2004-03-27   
301-284 4 Washington Zone 10 MD 829J PAETEC ITEL, LLC 236   2013-03-12   
301-287 8 Washington Zone 11 MD 829J PAETEC ITEL, LLC 236   2004-03-27   
301-288 8 Washington Zone 12 MD 829J PAETEC ITEL, LLC 236   2011-04-28   
301-290 2 Mechanicsville MD 829J PAETEC ITEL, LLC 236   2011-01-28   
301-290 3 Mechanicsville MD 829J PAETEC ITEL, LLC 236   2004-03-27   
301-314 A Washington Zone 4 MD 829J PAETEC ITEL, LLC 236   2025-04-02   
301-321 3 Washington Zone 11 MD 829J PAETEC ITEL, LLC 236   2014-06-09   
301-337 3 Gaithersburg MD 829J PAETEC ITEL, LLC 236   2011-03-08   
301-339 7 Washington Zone 10 MD 829J PAETEC ITEL, LLC 236   2006-12-21   
301-349 7 Poolesville MD 829J PAETEC ITEL, LLC 236   2007-04-15   
301-349 8 Poolesville MD 829J PAETEC ITEL, LLC 236   2011-01-28   
301-364 5 Washington Zone 4 MD 829J PAETEC ITEL, LLC 236   2005-12-07   
301-368 2 Damascus MD 829J PAETEC ITEL, LLC 236   2007-08-03   
301-375 3 Indian Head MD 829J PAETEC ITEL, LLC 236   2010-01-18   
301-375 4 Indian Head MD 829J PAETEC ITEL, LLC 236   2005-10-07   
301-392 2 La Plata MD 829J PAETEC ITEL, LLC 236   2006-12-01   
301-392 8 La Plata MD 829J PAETEC ITEL, LLC 236   2004-03-27   
301-405 A Washington Zone 4 MD 829J PAETEC ITEL, LLC 236   2025-04-02   
301-407 6 Gaithersburg MD 829J PAETEC ITEL, LLC 236   2011-10-13   
301-417 3 Washington Zone 10 MD 829J PAETEC ITEL, LLC 236   2015-09-17   
301-485 3 Washington Zone 6 MD 829J PAETEC ITEL, LLC 236   2015-09-04   
301-485 7 Washington Zone 6 MD 829J PAETEC ITEL, LLC 236   2006-09-02   
301-531 9 Washington Zone 4 MD 829J PAETEC ITEL, LLC 236   2003-04-06   
301-539 5 La Plata MD 829J PAETEC ITEL, LLC 236   2005-10-07   
301-539 8 La Plata MD 829J PAETEC ITEL, LLC 236   2008-01-23   
301-542 8 Waldorf MD 829J PAETEC ITEL, LLC 236   2004-03-27   
301-543 8 Laurel MD 829J PAETEC ITEL, LLC 236   2005-04-21   
301-560 A Washington Zone 4 MD 829J PAETEC ITEL, LLC 236   2025-04-02   
301-575 A Laurel MD 829J PAETEC ITEL, LLC 236   2025-04-02   
301-575 0 Laurel MD 829J PAETEC ITEL, LLC 236      
301-575 1 Laurel MD 829J PAETEC ITEL, LLC 236      
301-575 2 Laurel MD 829J PAETEC ITEL, LLC 236      
301-575 3 Laurel MD 829J PAETEC ITEL, LLC 236      
301-575 5 Laurel MD 829J PAETEC ITEL, LLC 236   2006-07-30   
301-575 9 Laurel MD 829J PAETEC ITEL, LLC 236      
301-576 A Washington Zone 3 MD 829J PAETEC ITEL, LLC 236   2025-04-02   
301-591 A Gaithersburg MD 829J PAETEC ITEL, LLC 236   2025-04-02   

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Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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