Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 571 [Rate centres in NPA 571] [Dial plan for NPA 571]

NXX: 746

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
571-746 A Dulles VA WASHDC12MMD  516J TON80 COMMUNICATIONS, LLC 236      
571-746 0 Dulles VA   073H TELNYX LLC 236   2023-02-26   
571-746 1 Dulles VA   5562 METROPCS, INC. 236   2022-04-21   
571-746 2 Dulles VA   515J IP HORIZON LLC 236   2024-06-29   
571-746 3 Dulles VA   515J IP HORIZON LLC 236   2024-06-29   
571-746 4 Dulles VA   515J IP HORIZON LLC 236   2024-12-26   
571-746 5 Dulles VA   079F BANDWIDTH.COM CLEC, LLC - VA 236   2024-09-19   
571-746 6 Dulles VA   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2022-08-01   
571-746 7 Dulles VA   516J TON80 COMMUNICATIONS, LLC 236   2022-04-20   
571-746 8 Dulles VA   275G PEERLESS NETWORK OF VIRGINIA, LLC - VA 236   2022-06-25   
571-746 9 Dulles VA   138E ONVOY, LLC - VA 236   2023-10-16   

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

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