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: 8964 XO D.C., INC.

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
202-821 A Washington Zone 1 DC WASHDCCZDS1  236      
202-821 0 Washington Zone 1 DC WASHDCCZDS1  236      
202-821 1 Washington Zone 1 DC WASHDCCZDS1  236      
202-821 4 Washington Zone 1 DC WASHDCCZDS1  236      

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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