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: 951

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
815-951 A Amboy IL LNRKILXA3MD  443F AERO NORTH COMMUNICATIONS, INC. - IL 364      
815-951 1 Amboy IL   224C ONVOY, LLC 364   2021-04-03   
815-951 4 Amboy IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 364   2022-04-17   
815-951 5 Amboy IL   624H ONVOY SPECTRUM, LLC 364   2023-07-05   
815-951 6 Amboy IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 364   2019-08-29   
815-951 9 Amboy IL   073H TELNYX LLC 364   2020-06-04   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.