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: 516

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
815-516 A Rockford IL RCFRILRCMMD  6529 T-MOBILE USA, INC. 360      
815-516 0 Rockford IL RCFRILRCJMD  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 360   2007-09-19   
815-516 1 Rockford IL RCFRILRCJMD  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 360   2010-02-01   
815-516 2 Rockford IL RCFRILRTDS1  9329 ILLINOIS BELL TEL CO 360   2002-12-10   
815-516 3 Rockford IL RCFRILRCMMD  6529 T-MOBILE USA, INC. 360   2004-02-10   
815-516 4 Rockford IL RCFRILRCMMD  6529 T-MOBILE USA, INC. 360   2006-02-04   
815-516 5 Rockford IL RCFRILRCJMD  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 360   2010-05-02   
815-516 6 Rockford IL RCFRILRCMMD  6529 T-MOBILE USA, INC. 360   2010-08-02   
815-516 7 Rockford IL RCFRILRCMMD  6529 T-MOBILE USA, INC. 360   2010-08-02   
815-516 8 Rockford IL RCFRILRCJMD  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 360   2009-07-02   
815-516 9 Rockford IL RCFRILRCMMD  6529 T-MOBILE USA, INC. 360   2010-09-30   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.