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: DCTRILDCDS0

Remotes:

Switch Switch name Switch type
HRTWILHTRS0  HARRISTOWN  RSC 

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
217-462 5 Decatur IL 9329 ILLINOIS BELL TEL CO 374      
217-464 A Decatur IL 9329 ILLINOIS BELL TEL CO 374      
217-464 1 Decatur IL 9329 ILLINOIS BELL TEL CO 374      
217-464 2 Decatur IL 9329 ILLINOIS BELL TEL CO 374      
217-464 3 Decatur IL 9329 ILLINOIS BELL TEL CO 374      
217-464 4 Decatur IL 9329 ILLINOIS BELL TEL CO 374      
217-464 5 Decatur IL 9329 ILLINOIS BELL TEL CO 374      
217-464 6 Decatur IL 9329 ILLINOIS BELL TEL CO 374      
217-464 7 Decatur IL 9329 ILLINOIS BELL TEL CO 374      
217-464 8 Decatur IL 9329 ILLINOIS BELL TEL CO 374      
217-475 A Decatur IL 9329 ILLINOIS BELL TEL CO 374      
217-475 0 Decatur IL 9329 ILLINOIS BELL TEL CO 374      
217-475 2 Decatur IL 9329 ILLINOIS BELL TEL CO 374      
217-475 3 Decatur IL 9329 ILLINOIS BELL TEL CO 374      
217-475 4 Decatur IL 9329 ILLINOIS BELL TEL CO 374      
217-475 5 Decatur IL 9329 ILLINOIS BELL TEL CO 374      
217-475 6 Decatur IL 9329 ILLINOIS BELL TEL CO 374      
217-475 7 Decatur IL 9329 ILLINOIS BELL TEL CO 374      
217-475 8 Decatur IL 9329 ILLINOIS BELL TEL CO 374      
217-475 9 Decatur IL 9329 ILLINOIS BELL TEL CO 374      

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Last updated: Sun, 17 May 2026 03:26:51 UTC

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