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: 815 [Rate centres in NPA 815] [Dial plan for NPA 815]

NXX: 623

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
815-623 A Roscoe IL ROSCILXADS0  1015 FRONTIER NORTH, INC. - IL 360      
815-623 0 Roscoe IL RCFRILRTZMD  224C ONVOY, LLC 360   2020-05-21   
815-623 1 Roscoe IL ROSCILXADS0  1015 FRONTIER NORTH, INC. - IL 360      
815-623 2 Roscoe IL ROSCILXADS0  1015 FRONTIER NORTH, INC. - IL 360      
815-623 3 Roscoe IL ROSCILXADS0  1015 FRONTIER NORTH, INC. - IL 360      
815-623 4 Roscoe IL RCFRILRTX4Y  318J COMCAST IP PHONE, LLC 360   2006-08-09   
815-623 5 Roscoe IL ROSCILXADS0  1015 FRONTIER NORTH, INC. - IL 360      
815-623 6 Roscoe IL ROSCILXADS0  1015 FRONTIER NORTH, INC. - IL 360      
815-623 7 Roscoe IL ROSCILXADS0  1015 FRONTIER NORTH, INC. - IL 360      
815-623 8 Roscoe IL ROSCILXADS0  1015 FRONTIER NORTH, INC. - IL 360      
815-623 9 Roscoe IL ROSCILXADS0  1015 FRONTIER NORTH, INC. - IL 360      

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.