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: RCFRILRTXGX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
779-210 A Rockford IL 516C AT&T CORP. 360      
779-210 7 Rockford IL 516C AT&T CORP. 360   2011-10-19   
815-329 A Rockford IL 516C AT&T CORP. 360      
815-329 7 Rockford IL 516C AT&T CORP. 360   2013-04-10   
815-847 A Rockford IL 516C AT&T CORP. 360      
815-847 1 Rockford IL 516C AT&T CORP. 360   2005-06-02   

Last updated: Sat, 15 Nov 2025 03:38:44 UTC

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