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: TYCRVA03DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
202-349 A Washington Zone 1 DC 2515 US LEC OF VIRGINIA, LLC - DC 236      
240-482 A Washington Zone 2 MD 2589 US LEC OF MARYLAND, INC. 236      
240-485 A Washington Zone 3 MD 2589 US LEC OF MARYLAND, INC. 236      
240-487 A Washington Zone 4 MD 2589 US LEC OF MARYLAND, INC. 236      
240-492 A Washington Zone 5 MD 2589 US LEC OF MARYLAND, INC. 236      
240-493 A Washington Zone 6 MD 2589 US LEC OF MARYLAND, INC. 236      
240-499 A Washington Zone 10 MD 2589 US LEC OF MARYLAND, INC. 236      
240-514 A Washington Zone 11 MD 2589 US LEC OF MARYLAND, INC. 236      
240-516 A Washington Zone 12 MD 2589 US LEC OF MARYLAND, INC. 236      
240-542 A Washington Zone 13 MD 2589 US LEC OF MARYLAND, INC. 236      
240-544 A Washington Zone 14 MD 2589 US LEC OF MARYLAND, INC. 236      
240-545 A Washington Zone 15 MD 2589 US LEC OF MARYLAND, INC. 236      
240-546 A Washington Zone 16 MD 2589 US LEC OF MARYLAND, INC. 236      
240-613 A Washington Zone 4 MD 2589 US LEC OF MARYLAND, INC. 236   2012-05-27   
240-912 A Gaithersburg MD 2589 US LEC OF MARYLAND, INC. 236      
301-575 A Laurel MD 2589 US LEC OF MARYLAND, INC. 236      
571-299 A Herndon VA 8357 US LEC OF VIRGINIA, LLC 236      
571-339 A Engleside VA 8357 US LEC OF VIRGINIA, LLC 236      
703-584 A Washington Zone 17 VA 8357 US LEC OF VIRGINIA, LLC 236      
703-592 A Washington Zone 19 VA 8357 US LEC OF VIRGINIA, LLC 236      
703-647 A Washington Zone 8 VA 8357 US LEC OF VIRGINIA, LLC 236      
703-663 A Washington Zone 17 VA 8357 US LEC OF VIRGINIA, LLC 236      
703-667 A Washington Zone 19 VA 8357 US LEC OF VIRGINIA, LLC 236      
703-674 A Herndon VA 8357 US LEC OF VIRGINIA, LLC 236      

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

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