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: 660

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
815-660 A Lockport IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
815-660 0 Lockport IL   224C ONVOY, LLC 358   2016-03-11   
815-660 1 Lockport IL   515J IP HORIZON LLC 358   2013-05-05   
815-660 2 Lockport IL   224C ONVOY, LLC 358   2016-03-11   
815-660 3 Lockport IL   8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
815-660 5 Lockport IL   073H TELNYX LLC 358   2017-05-08   
815-660 6 Lockport IL   318J COMCAST IP PHONE, LLC 358   2017-08-03   
815-660 7 Lockport IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2016-12-09   
815-660 8 Lockport IL   515J IP HORIZON LLC 358   2016-08-09   
815-660 9 Lockport IL   6529 T-MOBILE USA, INC. 358   2024-02-09   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.