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.

Switch: VINNVACB1MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
202-792 A Washington Zone 1 DC 513G ATLANTECH ONLINE, INC. - DC 236      
240-740 A Washington Zone 10 MD 361H ATLANTECH ONLINE, INC. - MD 236      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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