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: ODTNMDAUDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-373 A Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
410-854 A Waterloo (Washington DC LATA) MD 9212 VERIZON MARYLAND, INC. 236      
443-634 A Waterloo (Washington DC LATA) MD 9212 VERIZON MARYLAND, INC. 236      
443-654 A Waterloo (Washington DC LATA) MD 9212 VERIZON MARYLAND, INC. 236   2008-09-27   

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

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