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: OKBRILOAIMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
630-343 A Lemont IL 7421 AT&T LOCAL 358      
630-445 A Naperville IL 7421 AT&T LOCAL 358      
630-456 A Wheaton IL 7421 AT&T LOCAL 358      
630-478 A Elmhurst IL 7421 AT&T LOCAL 358      
630-568 A Oak Brook IL 7421 AT&T LOCAL 358      
630-581 A Hinsdale IL 7421 AT&T LOCAL 358      
630-634 A Bensenville IL 7421 AT&T LOCAL 358      
630-785 A Lombard IL 7421 AT&T LOCAL 358      
708-498 A Bellwood IL 7421 AT&T LOCAL 358      
708-552 A Summit IL 7421 AT&T LOCAL 358      
815-207 A Joliet West IL 7421 AT&T LOCAL 358      
847-230 A Willowcrest IL 7421 AT&T LOCAL 358      
847-261 A River Grove IL 7421 AT&T LOCAL 358      
847-264 A Elk Grove IL 7421 AT&T LOCAL 358      
847-285 A Willowcrest IL 7421 AT&T LOCAL 358      
847-637 A Arlington Heights IL 7421 AT&T LOCAL 358      
847-794 A Schaumburg North IL 7421 AT&T LOCAL 358      

Last updated: Tue, 31 Dec 2019 02:37:20 UTC

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