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.
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Switch: LEMTILLNDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
630-252 A Lemont North IL 9329 ILLINOIS BELL TEL CO 358      
630-427 A Lemont North IL 9329 ILLINOIS BELL TEL CO 358      
630-427 0 Lemont North IL 9329 ILLINOIS BELL TEL CO 358      
630-427 1 Lemont North IL 9329 ILLINOIS BELL TEL CO 358      
630-427 2 Lemont North IL 9329 ILLINOIS BELL TEL CO 358      
630-427 3 Lemont North IL 9329 ILLINOIS BELL TEL CO 358      
630-427 9 Lemont North IL 9329 ILLINOIS BELL TEL CO 358      
630-739 A Lemont North IL 9329 ILLINOIS BELL TEL CO 358      
630-783 A Lemont North IL 9329 ILLINOIS BELL TEL CO 358      
630-910 A Lemont North IL 9329 ILLINOIS BELL TEL CO 358      
630-972 A Lemont North IL 9329 ILLINOIS BELL TEL CO 358      
630-985 A Lemont North IL 9329 ILLINOIS BELL TEL CO 358      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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