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: 300

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
571-300 A Dale City VA BTVLMD12CM9  5562 METROPCS, INC. 236      
571-300 0 Dale City VA   079F BANDWIDTH.COM CLEC, LLC - VA 236   2024-12-22   
571-300 1 Dale City VA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-12-12   
571-300 2 Dale City VA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-12-12   
571-300 3 Dale City VA   5562 METROPCS, INC. 236   2019-01-20   
571-300 4 Dale City VA   624H ONVOY SPECTRUM, LLC 236   2021-05-21   
571-300 5 Dale City VA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2019-10-07   
571-300 6 Dale City VA   5562 METROPCS, INC. 236   2019-11-04   
571-300 7 Dale City VA   073H TELNYX LLC 236   2019-12-05   
571-300 8 Dale City VA   551G NUSO, LLC 236   2018-07-31   
571-300 9 Dale City VA   5562 METROPCS, INC. 236   2018-01-25   

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.