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: 921

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
401-921 A Warwick RI PRVDRIWAHMD  318J COMCAST IP PHONE LLC 130      
401-921 0 Warwick RI PRVDRIWAHMD  318J COMCAST IP PHONE LLC 130      
401-921 1 Warwick RI PRVDRIWAHMD  318J COMCAST IP PHONE LLC 130      
401-921 2 Warwick RI PRVDRIWAHMD  318J COMCAST IP PHONE LLC 130   2003-05-09   
401-921 3 Warwick RI PRVDRIWAHMD  318J COMCAST IP PHONE LLC 130   2004-07-23   
401-921 4 Warwick RI PRVDRIWAHMD  318J COMCAST IP PHONE LLC 130   2005-05-11   
401-921 5 Warwick RI PRVDRIWAHMD  318J COMCAST IP PHONE LLC 130   2005-11-11   
401-921 6 Warwick RI PRVDRIWAHMD  318J COMCAST IP PHONE LLC 130   2006-09-06   
401-921 7 Warwick RI PRVDRIWAHMD  318J COMCAST IP PHONE LLC 130   2011-02-25   
401-921 8 Warwick RI PRVDRIWAHMD  318J COMCAST IP PHONE LLC 130   2012-03-28   
401-921 9 Warwick RI PRVDRIWAHMD  318J COMCAST IP PHONE LLC 130   2016-11-21   

Last updated: Wed, 01 Jun 2022 03:09:23 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.