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: NPVLILNEDS0

Remotes:

Switch Switch name Switch type
NPVLILBJRS0  NAPERVILLE  ORM 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
331-281 A Naperville IL 9329 ILLINOIS BELL TEL CO 358      
630-245 A Naperville Northeast IL 9329 ILLINOIS BELL TEL CO 358      
630-505 A Naperville Northeast IL 9329 ILLINOIS BELL TEL CO 358      
630-577 A Naperville Northeast IL 9329 ILLINOIS BELL TEL CO 358      
630-649 A Naperville Northeast IL 9329 ILLINOIS BELL TEL CO 358      
630-713 A Naperville Northeast IL 9329 ILLINOIS BELL TEL CO 358      
630-799 A Naperville Northeast IL 9329 ILLINOIS BELL TEL CO 358      
630-857 A Naperville Northeast IL 9329 ILLINOIS BELL TEL CO 358      
630-955 A Naperville Northeast IL 9329 ILLINOIS BELL TEL CO 358      
630-979 A Naperville Northeast IL 9329 ILLINOIS BELL TEL CO 358      

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

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