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: 401 [Rate centres in NPA 401] [Dial plan for NPA 401]

NXX: 384

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
401-384 A Warwick RI   829J PAETEC ITEL, LLC 130      
401-384 0 Warwick RI   003F BANDWIDTH.COM CLEC, LLC - RI 130   2009-02-08   
401-384 6 Warwick RI   829J PAETEC ITEL, LLC 130      
401-384 7 Warwick RI   318J COMCAST IP PHONE, LLC 130   2018-03-10   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.