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: WASHDCSWMMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
202-202 A Washington Zone 1 DC 624H ONVOY SPECTRUM, LLC 236      
202-703 A Washington Zone 1 DC 624H ONVOY SPECTRUM, LLC 236      
202-890 A Washington Zone 1 DC 624H ONVOY SPECTRUM, LLC 236      
202-995 A Washington Zone 1 DC 624H ONVOY SPECTRUM, LLC 236      
227-722 A Waldorf MD 624H ONVOY SPECTRUM, LLC 236   2024-06-26   
227-727 A Washington Zone 6 MD 624H ONVOY SPECTRUM, LLC 236   2025-01-02   
227-770 A Washington Zone 11 MD 624H ONVOY SPECTRUM, LLC 236   2025-01-02   
227-772 A Washington Zone 4 MD 624H ONVOY SPECTRUM, LLC 236   2025-01-02   
240-259 A Hughesville MD 624H ONVOY SPECTRUM, LLC 236      
240-717 A Leonardtown MD 624H ONVOY SPECTRUM, LLC 236      
240-768 A Nanjemoy MD 624H ONVOY SPECTRUM, LLC 236      
240-884 A Tompkinsville MD 624H ONVOY SPECTRUM, LLC 236      
301-409 A Washington Zone 2 MD 624H ONVOY SPECTRUM, LLC 236      
301-410 A Washington Zone 6 MD 624H ONVOY SPECTRUM, LLC 236      
301-781 A Washington Zone 4 MD 624H ONVOY SPECTRUM, LLC 236      
571-563 A Herndon VA 624H ONVOY SPECTRUM, LLC 236      
571-573 A Nokesville VA 624H ONVOY SPECTRUM, LLC 236      
571-574 A Washington Zone 17 VA 624H ONVOY SPECTRUM, LLC 236      
571-710 A Lorton VA 624H ONVOY SPECTRUM, LLC 236      
703-301 A Washington Zone 8 VA 624H ONVOY SPECTRUM, LLC 236      
703-410 A Manassas VA 624H ONVOY SPECTRUM, LLC 236   2024-01-22   
703-540 A Washington Zone 8 VA 624H ONVOY SPECTRUM, LLC 236   2024-05-15   
703-703 A Washington Zone 17 VA 624H ONVOY SPECTRUM, LLC 236      
771-717 A Washington Zone 1 DC 624H ONVOY SPECTRUM, LLC 236      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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