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: CHCGILCLXOX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
219-301 A Highland IN 516C AT&T CORP. 358      
219-501 A Hammond IN 516C AT&T CORP. 358      
224-218 A Hampshire IL 516C AT&T CORP. 358      
224-225 A Fox Lake IL 516C AT&T CORP. 358      
224-357 A Cary IL 516C AT&T CORP. 358      
224-372 A Lake Villa IL 516C AT&T CORP. 358      
224-735 A Arlington Heights IL 516C AT&T CORP. 358      
224-858 A Huntley IL 516C AT&T CORP. 358      
312-877 A Chicago Zone 01-Calumet IL 516C AT&T CORP. 358      
331-903 A Downers Grove IL 516C AT&T CORP. 358      
630-486 A Aurora IL 516C AT&T CORP. 358      
630-708 A Yorkville IL 516C AT&T CORP. 358      
630-934 A Elburn IL 516C AT&T CORP. 358      
708-584 A Beecher IL 516C AT&T CORP. 358      
708-586 A Palos Park IL 516C AT&T CORP. 358      
708-634 A Oak Lawn IL 516C AT&T CORP. 358      
779-235 A Crescent City IL 516C AT&T CORP. 358      
779-429 A Wilmington IL 516C AT&T CORP. 358      
815-290 A Minooka IL 516C AT&T CORP. 358      
815-596 A Marengo IL 516C AT&T CORP. 358      
872-244 A Chicago Zone 07-Stewart IL 516C AT&T CORP. 358      
872-267 A Chicago Zone 08-Portsmouth IL 516C AT&T CORP. 358      
872-281 A Chicago Zone 06-Kedzie IL 516C AT&T CORP. 358      
872-444 A Chicago Zone 06-Kedzie IL 516C AT&T CORP. 358      
872-818 A Chicago Zone 07-Stewart IL 516C AT&T CORP. 358      

Last updated: Fri, 01 Jul 2022 02:53:40 UTC

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