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: 4773 XO MARYLAND, LLC

1 2 3 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
240-241 5 Washington Zone 13 MD WASHDCCZDS1  236   2007-07-09   
240-241 6 Washington Zone 13 MD WASHDCCZDS1  236   2007-07-09   
240-254 5 Hughesville MD WASHDCCZDS1  236   2005-08-15   
240-254 6 Hughesville MD WASHDCCZDS1  236   2005-08-15   
240-256 7 Leonardtown MD WASHDCCZDS1  236   2005-08-15   
240-256 8 Leonardtown MD WASHDCCZDS1  236   2005-08-15   
240-292 7 Washington Zone 11 MD WASHDCCZDS1  236   2007-07-29   
240-316 3 Washington Zone 2 MD WASHDCCZDS1  236   2009-07-31   
240-383 1 Washington Zone 2 MD WASHDCCZDS1  236   2007-07-22   
240-383 3 Washington Zone 2 MD WASHDCCZDS1  236   2007-07-22   
240-390 2 Ashton MD WASHDCCZDS1  236   2006-08-12   
240-454 8 Gaithersburg MD WASHDCCZDS1  236   2006-08-12   
240-454 9 Gaithersburg MD WASHDCCZDS1  236   2006-08-12   
240-489 6 Poolesville MD WASHDCCZDS1  236   2005-08-15   
240-489 7 Poolesville MD WASHDCCZDS1  236   2005-08-15   
240-489 8 Poolesville MD WASHDCCZDS1  236   2005-08-15   
240-510 1 Washington Zone 15 MD WASHDCCZDS1  236   2007-03-26   
240-510 2 Washington Zone 15 MD WASHDCCZDS1  236   2007-03-26   
240-516 7 Washington Zone 12 MD WASHDCCZDS1  236   2007-04-05   
240-523 6 La Plata MD WASHDCCZDS1  236   2005-08-15   
240-523 7 La Plata MD WASHDCCZDS1  236   2005-08-15   
240-523 8 La Plata MD WASHDCCZDS1  236   2005-08-15   
240-547 6 Laurel MD WASHDCCZDS1  236   2006-10-27   
240-582 3 Washington Zone 4 MD WASHDCCZDS1  236   2010-04-29   
240-582 8 Washington Zone 4 MD WASHDCCZDS1  236   2007-03-26   
240-582 9 Washington Zone 4 MD WASHDCCZDS1  236   2007-03-26   
240-583 8 Laurel MD WASHDCCZDS1  236   2010-09-02   
240-607 6 Waldorf MD WASHDCCZDS1  236   2005-05-23   
240-607 7 Waldorf MD WASHDCCZDS1  236   2005-05-23   
240-607 8 Waldorf MD WASHDCCZDS1  236   2005-05-23   
240-619 7 Washington Zone 5 MD WASHDCCZDS1  236   2007-07-29   
240-621 3 Washington Zone 11 MD WASHDCCZDS1  236   2011-10-23   
240-652 8 Mechanicsville MD WASHDCCZDS1  236   2005-08-15   
240-652 9 Mechanicsville MD WASHDCCZDS1  236   2005-08-15   
240-667 8 Washington Zone 4 MD WASHDCCZDS1  236   2012-03-28   
240-668 5 Damascus MD WASHDCCZDS1  236   2005-11-24   
240-668 6 Damascus MD WASHDCCZDS1  236   2005-11-24   
240-668 9 Damascus MD WASHDCCZDS1  236   2005-11-24   
240-685 7 Brandywine MD WASHDCCZDS1  236   2013-05-29   
240-718 1 Lexington Park-Great Mills MD WASHDCCZDS1  236   2005-08-15   
240-718 2 Lexington Park-Great Mills MD WASHDCCZDS1  236   2005-08-15   
240-718 3 Lexington Park-Great Mills MD WASHDCCZDS1  236   2005-08-15   
240-718 5 Lexington Park-Great Mills MD WASHDCCZDS1  236   2010-12-29   
240-720 6 Gaithersburg MD WASHDCCZDS1  236   2008-11-01   
240-800 2 Washington Zone 2 MD WASHDCCZDS1  236   2012-08-27   
240-804 A Tompkinsville MD WASHDCCZDS1  236      
240-813 7 Gaithersburg MD WASHDCCZDS1  236   2009-12-22   
240-823 1 Brandywine MD WASHDCCZDS1  236   2005-08-14   
240-823 9 Brandywine MD WASHDCCZDS1  236   2005-08-14   
240-844 A Ridge MD WASHDCCZDS1  236      

1 2 3 >>

Last updated: Wed, 07 Feb 2024 04:12:25 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.