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: WASHDCMTX7X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
202-536 A Washington Zone 1 DC 2695 CTC COMMUNICATIONS CORP. - DC 236      
202-844 A Washington Zone 1 DC 2695 CTC COMMUNICATIONS CORP. - DC 236      
571-451 A Washington Zone 8 VA 2700 CTC COMMUNICATIONS CORP. - VA 236      
703-357 A Occoquan VA 2700 CTC COMMUNICATIONS CORP. - VA 236      
703-853 A Manassas VA 2700 CTC COMMUNICATIONS CORP. - VA 236      

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

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