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: 2589 US LEC OF MARYLAND, INC.

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
240-233 1 Tompkinsville MD   236   2004-02-05   
240-237 1 Lexington Park-Great Mills MD   236   2004-02-05   
240-249 1 Mechanicsville MD   236   2004-02-04   
240-254 1 Hughesville MD   236   2004-02-05   
240-256 1 Leonardtown MD   236   2004-02-05   
240-257 1 Nanjemoy MD   236   2004-02-04   
240-258 1 Ridge MD   236   2004-02-05   
240-288 4 Thurmont MD   240   2014-11-03   
240-310 1 Hagerstown MD   240   2008-02-11   
240-330 1 Washington Zone 2 MD   236   2008-05-14   
240-366 3 Williamsport MD   240   2011-09-19   
240-380 1 Washington Zone 2 MD   236   2008-01-07   
240-397 2 Frederick MD   240   2009-11-04   
240-398 5 Washington Zone 3 MD   236   2004-11-21   
240-405 A Frederick MD FRDRMDFRPMD  240   2004-09-17   
240-405 1 Frederick MD   240   2004-09-17   
240-415 7 Frederick MD   240   2011-02-28   
240-427 1 Waldorf MD   236   2002-04-26   
240-436 1 Buckeystown MD   240   2005-04-23   
240-436 4 Buckeystown MD   240   2011-02-28   
240-482 A Washington Zone 2 MD TYCRVA03DS0  236      
240-482 0 Washington Zone 2 MD   236      
240-482 1 Washington Zone 2 MD   236      
240-482 2 Washington Zone 2 MD   236      
240-482 3 Washington Zone 2 MD   236      
240-482 4 Washington Zone 2 MD   236      
240-485 A Washington Zone 3 MD TYCRVA03DS0  236      
240-485 0 Washington Zone 3 MD   236      
240-485 1 Washington Zone 3 MD   236      
240-485 2 Washington Zone 3 MD   236      
240-485 3 Washington Zone 3 MD   236      
240-485 5 Washington Zone 3 MD   236      
240-487 A Washington Zone 4 MD TYCRVA03DS0  236      
240-487 0 Washington Zone 4 MD   236      
240-487 1 Washington Zone 4 MD   236      
240-487 2 Washington Zone 4 MD   236      
240-487 3 Washington Zone 4 MD   236      
240-487 5 Washington Zone 4 MD   236      
240-492 A Washington Zone 5 MD TYCRVA03DS0  236      
240-492 0 Washington Zone 5 MD   236      
240-492 1 Washington Zone 5 MD   236      
240-492 2 Washington Zone 5 MD   236      
240-492 3 Washington Zone 5 MD   236      
240-492 4 Washington Zone 5 MD   236      
240-493 A Washington Zone 6 MD TYCRVA03DS0  236      
240-493 0 Washington Zone 6 MD   236      
240-493 1 Washington Zone 6 MD   236      
240-493 2 Washington Zone 6 MD   236      
240-493 3 Washington Zone 6 MD   236      
240-493 5 Washington Zone 6 MD   236      

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Last updated: Sat, 31 Oct 2020 19:28:10 UTC

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