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: 228C IDT AMERICA, CORP. - MD

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
240-237 8 Lexington Park-Great Mills MD   236   2007-09-12   
240-249 6 Mechanicsville MD   236   2007-09-12   
240-258 5 Ridge MD   236   2007-09-12   
240-284 1 Frostburg MD   240   2006-03-10   
240-309 4 Leonardtown MD   236   2013-02-10   
240-317 5 Lexington Park-Great Mills MD   236   2009-03-05   
240-362 7 Cumberland MD   240   2006-10-06   
240-522 0 Cumberland MD   240   2007-08-03   
240-609 1 Cumberland MD   240   2016-08-18   
240-661 5 Lexington Park-Great Mills MD   236   2016-09-15   
301-264 2 Mount Savage MD   240   2006-03-10   
301-338 A Cumberland MD CMLDMDCH0MD  240      
301-338 2 Cumberland MD   240   2006-03-25   
301-463 1 Lonaconing MD   240   2006-03-10   
301-478 1 Flintstone MD   240   2006-03-10   
301-690 A Leonardtown MD CHCHMDBEXCX  236      
301-690 2 Leonardtown MD   236   2007-07-14   
301-786 1 McCoole MD   240   2006-03-10   
410-200 2 Easton MD   242   2006-05-21   
410-226 1 Oxford MD   242   2006-05-21   
410-304 A Queenstown MD ESTNMDESMMD  242      
410-304 2 Queenstown MD   242   2006-05-20   
410-348 3 Still Pond MD   242   2006-05-21   
410-364 3 Hillsboro MD   242   2006-05-21   
410-438 6 Sudlersville MD   242   2006-05-21   
410-476 6 Trappe MD   242   2006-05-21   
410-482 3 Greensboro MD   242   2006-05-21   
410-556 2 Church Hill MD   242   2006-05-06   
410-618 A Perryville MD BLTMMDCH3MD  238      
410-618 2 Perryville MD   238   2012-01-06   
410-634 4 Ridgely MD   242   2012-06-01   
410-639 4 Rock Hall MD   242   2006-05-21   
410-648 1 Galena MD   242   2006-05-21   
410-745 8 St Michaels MD   242   2006-05-21   
410-755 0 Warwick MD   242   2012-07-07   
410-885 7 Chesapeake City MD   242   2012-01-08   
410-886 1 Tilghman MD   242   2006-05-21   
410-928 2 Millington MD   242   2006-05-21   
443-249 3 Stevensville MD   242   2006-05-21   
443-249 5 Stevensville MD   242   2012-12-21   
443-262 8 Centreville MD   242   2006-05-06   
443-282 0 Chestertown MD   242   2006-05-06   
443-747 4 Port Deposit MD   238   2012-01-08   
443-782 8 Annapolis MD   238   2018-01-14   
443-941 2 Elkton MD   238   2012-01-08   
443-967 2 North East MD   238   2012-01-08   
443-972 7 Cambridge MD   242   2018-01-14   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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