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.

Switch: PRVDRIWAY0X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
401-291 A Providence RI 425J CSC WIRELESS, LLC 130      
401-291 2 Providence RI 425J CSC WIRELESS, LLC 130   2020-04-17   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.