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: EMHRILETDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
331-221 A Elmhurst IL 9329 ILLINOIS BELL TEL CO 358      
630-279 A Elmhurst IL 9329 ILLINOIS BELL TEL CO 358      
630-415 A Elmhurst IL 9329 ILLINOIS BELL TEL CO 358      
630-516 A Elmhurst IL 9329 ILLINOIS BELL TEL CO 358      
630-530 A Elmhurst IL 9329 ILLINOIS BELL TEL CO 358      
630-617 A Elmhurst IL 9329 ILLINOIS BELL TEL CO 358      
630-758 A Elmhurst IL 9329 ILLINOIS BELL TEL CO 358      
630-782 A Elmhurst IL 9329 ILLINOIS BELL TEL CO 358      
630-832 A Elmhurst IL 9329 ILLINOIS BELL TEL CO 358      
630-833 A Elmhurst IL 9329 ILLINOIS BELL TEL CO 358      
630-834 A Elmhurst IL 9329 ILLINOIS BELL TEL CO 358      
630-941 A Elmhurst IL 9329 ILLINOIS BELL TEL CO 358      
630-956 A Elmhurst IL 9329 ILLINOIS BELL TEL CO 358      
630-993 A Elmhurst IL 9329 ILLINOIS BELL TEL CO 358      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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