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: OKBRILOAXEX

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
847-932 A Libertyville IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
847-943 A Deerfield IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
847-972 A Skokie IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
872-289 A Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
872-317 A Chicago Zone 07-Stewart IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
872-318 A Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
872-323 A Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
872-374 A Chicago Zone 02-Edgewater IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2024-03-25   

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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