Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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OCN: 8697 BALTIMORE-WASHINGTON TELEPHONE (BWT)

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
240-270 9 Waldorf MD CHCHMDBE1MD  236   2015-08-17   
240-365 A Damascus MD VINNVACB2MD  236      
240-466 0 Mechanicsville MD CHCHMDBE1MD  236   2015-06-20   
240-474 A Gaithersburg MD VINNVACB2MD  236      
240-474 4 Gaithersburg MD VINNVACB2MD  236   2015-07-13   
240-633 A Hughesville MD VINNVACB2MD  236      
240-633 3 Hughesville MD VINNVACB2MD  236   2015-07-13   
240-661 A Lexington Park-Great Mills MD VINNVACB2MD  236      
240-661 9 Lexington Park-Great Mills MD VINNVACB2MD  236   2015-07-12   
240-865 9 Washington Zone 14 (Baltimore LATA) MD BLTMMDCH25Z  238   2006-05-05   
240-901 1 La Plata MD CHCHMDBE1MD  236   2015-06-20   
240-972 A Laurel (Baltimore LATA) MD BLTMMDSN3MD  238      
240-972 9 Laurel (Baltimore LATA) MD BLTMMDSN3MD  238   2015-07-17   
301-200 6 Indian Head MD CHCHMDBE1MD  236   2015-06-20   
301-242 2 Brandywine MD CHCHMDBE1MD  236   2015-06-05   
301-246 5 Nanjemoy MD CHCHMDBE1MD  236   2015-05-30   
301-307 7 Washington Zone 13 (Baltimore LATA) MD BLTMMDCH25Z  238   2015-06-20   
301-329 9 Ashton (Baltimore LATA) MD BLTMMDCH25Z  238   2015-06-05   
301-448 4 Washington Zone 3 MD CHCHMDBE1MD  236   2011-01-10   
301-551 A Washington Zone 3 MD VINNVACB2MD  236      
301-561 A Washington Zone 3 MD VINNVACB2MD  236      
301-584 A Washington Zone 12 MD VINNVACB2MD  236      
301-658 0 Ashton MD CHCHMDBE1MD  236   2015-06-04   
301-690 3 Leonardtown MD CHCHMDBE1MD  236   2015-06-20   
301-691 6 Poolesville MD CHCHMDBE1MD  236   2015-06-20   
301-727 A Washington Zone 5 MD VINNVACB2MD  236      
301-812 8 Washington Zone 15 (Baltimore LATA) MD BLTMMDCH25Z  238   2015-06-22   
301-813 A Washington Zone 2 MD VINNVACB2MD  236      
301-875 0 Laurel MD CHCHMDBE1MD  236   2004-11-20   
301-886 3 Washington Zone 13 MD CHCHMDBE1MD  236   2006-05-05   
410-238 9 Essex MD BLTMMDCH25Z  238   2015-06-11   
410-324 9 Towson MD BLTMMDCH25Z  238   2015-07-17   
410-344 4 Chase MD BLTMMDCH25Z  238   2015-06-09   
410-399 5 Bel Air MD BLTMMDCH25Z  238   2015-06-05   
410-452 2 Cardiff MD BLTMMDCH25Z  238   2015-06-05   
410-509 A Waterloo (Washington DC LATA) MD VINNVACB2MD  236      
410-557 5 Fork MD BLTMMDCH25Z  238   2006-05-13   
410-587 7 Arbutus MD BLTMMDCH25Z  238   2015-05-28   
410-650 1 Dundalk MD BLTMMDCH25Z  238   2015-06-11   
410-692 1 Jarrettsville MD BLTMMDCH25Z  238   2015-06-18   
410-741 7 West River MD BLTMMDCH25Z  238   2015-06-20   
410-775 3 Union Bridge MD BLTMMDCH25Z  238   2006-05-05   
410-781 2 Ellicott City MD BLTMMDCH25Z  238   2006-05-04   
410-794 5 Columbia MD BLTMMDCH25Z  238   2006-05-04   
410-807 4 Catonsville MD BLTMMDCH25Z  238   2006-05-13   
410-914 6 Churchville MD BLTMMDCH25Z  238   2015-06-05   
410-915 A Baltimore MD BLTMMDSN3MD  238      
410-985 A Waterloo (Washington DC LATA) MD VINNVACB2MD  236      
410-999 A Glen Burnie MD BLTMMDSN3MD  238      
410-999 2 Glen Burnie MD BLTMMDCH25Z  238   2010-11-06   
410-999 3 Glen Burnie MD BLTMMDCH25Z  238   2010-11-06   
410-999 6 Glen Burnie MD BLTMMDCH25Z  238   2003-07-26   
410-999 9 Glen Burnie MD BLTMMDSN3MD  238   2003-07-26   
443-331 8 Taneytown MD BLTMMDCH25Z  238   2015-07-17   
443-419 8 Glenwood MD BLTMMDCH25Z  238   2015-06-11   
443-456 9 Edgewood MD BLTMMDCH25Z  238   2015-06-11   
443-457 4 Brooklyn Park-Linthicum MD BLTMMDCH25Z  238   2015-06-05   
443-504 6 Fallston MD BLTMMDCH25Z  238   2015-06-14   
443-526 9 Havre de Grace MD BLTMMDCH25Z  238   2015-06-13   
443-585 5 Darlington MD BLTMMDCH25Z  238   2015-06-11   
443-639 6 Hampstead MD BLTMMDCH25Z  238   2015-06-13   
443-663 0 Woodlawn MD BLTMMDCH25Z  238   2015-06-20   
443-747 5 Port Deposit MD BLTMMDCH25Z  238   2006-05-04   
443-775 6 Annapolis MD BLTMMDCH25Z  238   2015-05-28   
443-776 6 Elkridge MD BLTMMDCH25Z  238   2015-06-11   
443-914 5 Worthington MD BLTMMDCH25Z  238   2015-06-20   
443-933 3 Cockeysville MD BLTMMDCH25Z  238   2015-06-05   
443-941 1 Elkton MD BLTMMDCH25Z  238   2015-06-11   
667-228 0 Aberdeen MD BLTMMDCH25Z  236   2015-05-25   
667-333 A Armiger-Gibson Island MD BLTMMDSN3MD  238      
667-333 3 Armiger-Gibson Island MD BLTMMDSN3MD  238   2015-07-05   
667-367 A Westminster MD BLTMMDSN3MD  238      
667-367 9 Westminster MD BLTMMDSN3MD  238   2015-07-12   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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