Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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OCN: 4773 XO MARYLAND, LLC

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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   
240-256 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 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 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 9 Mechanicsville MD WASHDCCZDS1  236   2005-08-15   
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 3 Lexington Park-Great Mills MD WASHDCCZDS1  236   2005-08-15   
240-720 6 Gaithersburg MD WASHDCCZDS1  236   2008-11-01   
240-800 2 Washington Zone 2 MD WASHDCCZDS1  236   2012-08-27   
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   
240-993 8 Indian Head MD WASHDCCZDS1  236   2005-08-15   
301-250 7 Gaithersburg MD WASHDCCZDS1  236   2010-12-30   
301-398 7 Washington Zone 10 MD WASHDCCZDS1  236   2003-11-09   
301-398 8 Washington Zone 10 MD WASHDCCZDS1  236   2003-11-09   
301-398 9 Washington Zone 10 MD WASHDCCZDS1  236   2003-11-09   
301-500 A Washington Zone 2 MD WASHDCCZDS1  236      
301-500 2 Washington Zone 2 MD WASHDCCZDS1  236   2011-04-18   
301-547 8 Washington Zone 2 MD WASHDCCZDS1  236   2014-02-21   
301-836 3 Washington Zone 5 MD WASHDCCZDS1  236   2011-01-25   
410-205 2 Pikesville MD BLTMMDSNDS5  238   2009-09-09   
410-630 3 Chase MD BLTMMDSNDS5  238   2005-08-14   
410-630 5 Chase MD BLTMMDSNDS5  238   2005-08-14   
443-203 2 West River MD BLTMMDSNDS5  238   2008-06-20   
443-213 1 Pikesville MD BLTMMDSNDS5  238   2006-09-11   

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Last updated: Fri, 28 Jun 2024 03:14:50 UTC

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