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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Switch: CHCHMDBE1MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-270 9 Waldorf MD 8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236   2015-08-17   
240-466 0 Mechanicsville MD 8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236   2015-06-20   
240-901 1 La Plata MD 8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236   2015-06-20   
301-200 6 Indian Head MD 8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236   2015-06-20   
301-242 2 Brandywine MD 8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236   2015-06-05   
301-246 5 Nanjemoy MD 8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236   2015-05-30   
301-448 4 Washington Zone 3 MD 8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236   2011-01-10   
301-658 0 Ashton MD 8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236   2015-06-04   
301-690 3 Leonardtown MD 8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236   2015-06-20   
301-691 6 Poolesville MD 8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236   2015-06-20   
301-875 0 Laurel MD 8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236   2004-11-20   
301-886 3 Washington Zone 13 MD 8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236   2006-05-05   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

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