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: 681

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
571-681 A Washington Zone 19 VA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-10-11   
571-681 3 Washington Zone 19 VA   073H TELNYX LLC 236      
571-681 5 Washington Zone 19 VA   275G PEERLESS NETWORK OF VIRGINIA, LLC - VA 236      
571-681 7 Washington Zone 19 VA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
571-681 8 Washington Zone 19 VA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
571-681 9 Washington Zone 19 VA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.