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: ARTNVAARX5Y

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
571-507 0 Washington Zone 17 VA 939H COMMIO, LLC 236   2021-07-04   
571-507 1 Washington Zone 17 VA 939H COMMIO, LLC 236   2021-07-04   
571-507 8 Washington Zone 17 VA 939H COMMIO, LLC 236   2021-07-04   
571-507 9 Washington Zone 17 VA 939H COMMIO, LLC 236   2021-07-04   
571-576 0 Manassas VA 939H COMMIO, LLC 236   2021-10-03   
571-576 1 Manassas VA 939H COMMIO, LLC 236   2021-10-03   
571-576 8 Manassas VA 939H COMMIO, LLC 236   2021-10-03   
571-576 9 Manassas VA 939H COMMIO, LLC 236   2021-10-03   
571-583 1 Braddock VA 939H COMMIO, LLC 236   2022-12-23   
571-592 A Occoquan VA 939H COMMIO, LLC 236      
571-592 0 Occoquan VA 939H COMMIO, LLC 236   2023-01-13   
571-592 1 Occoquan VA 939H COMMIO, LLC 236   2023-01-13   
571-592 3 Occoquan VA 939H COMMIO, LLC 236   2024-02-09   
571-592 4 Occoquan VA 939H COMMIO, LLC 236   2024-02-09   
571-592 5 Occoquan VA 939H COMMIO, LLC 236   2024-02-09   
571-592 6 Occoquan VA 939H COMMIO, LLC 236   2024-02-09   
571-596 5 Washington Zone 17 VA 939H COMMIO, LLC 236   2024-02-09   
571-661 2 Washington Zone 17 VA 939H COMMIO, LLC 236   2024-02-09   
571-661 3 Washington Zone 17 VA 939H COMMIO, LLC 236   2024-02-09   
571-661 4 Washington Zone 17 VA 939H COMMIO, LLC 236   2024-02-09   
571-663 0 Washington Zone 19 VA 939H COMMIO, LLC 236   2024-02-09   
571-663 1 Washington Zone 19 VA 939H COMMIO, LLC 236   2024-02-09   
571-663 2 Washington Zone 19 VA 939H COMMIO, LLC 236   2024-02-09   
571-664 A Manassas VA 939H COMMIO, LLC 236   2024-03-15   
571-664 0 Manassas VA 939H COMMIO, LLC 236   2024-03-15   
571-664 1 Manassas VA 939H COMMIO, LLC 236   2024-03-15   
571-664 2 Manassas VA 939H COMMIO, LLC 236   2024-03-15   
571-670 A Washington Zone 8 VA 939H COMMIO, LLC 236   2024-03-15   
571-670 0 Washington Zone 8 VA 939H COMMIO, LLC 236   2024-03-15   
571-670 1 Washington Zone 8 VA 939H COMMIO, LLC 236   2024-03-15   
571-670 2 Washington Zone 8 VA 939H COMMIO, LLC 236   2024-03-15   
571-670 3 Washington Zone 8 VA 939H COMMIO, LLC 236   2024-03-15   
571-670 4 Washington Zone 8 VA 939H COMMIO, LLC 236   2024-03-15   
571-670 5 Washington Zone 8 VA 939H COMMIO, LLC 236   2024-03-15   
571-867 A Washington Zone 8 VA 939H COMMIO, LLC 236      
571-867 5 Washington Zone 8 VA 939H COMMIO, LLC 236   2017-07-09   
703-755 8 Washington Zone 19 VA 939H COMMIO, LLC 236   2021-08-29   
703-993 0 Washington Zone 19 VA 939H COMMIO, LLC 236   2021-08-29   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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