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.

NPA: 571 [Rate centres in NPA 571] [Dial plan for NPA 571]

NXX: 786

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
571-786 A Herndon VA ARTNVAARXBY  965H FRACTEL, LLC 236      
571-786 0 Herndon VA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2021-10-20   
571-786 1 Herndon VA   138E ONVOY, LLC - VA 236   2020-12-04   
571-786 2 Herndon VA   138E ONVOY, LLC - VA 236   2020-12-04   
571-786 3 Herndon VA   516J TON80 COMMUNICATIONS, LLC 236   2021-09-04   
571-786 4 Herndon VA   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2020-12-14   
571-786 5 Herndon VA   138E ONVOY, LLC - VA 236   2020-12-04   
571-786 6 Herndon VA   138E ONVOY, LLC - VA 236   2020-12-04   
571-786 7 Herndon VA   965H FRACTEL, LLC 236   2020-09-06   
571-786 8 Herndon VA   138E ONVOY, LLC - VA 236   2020-12-04   
571-786 9 Herndon VA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2021-10-20   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.