Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 618 [Rate centres in NPA 618] [Dial plan for NPA 618]

NXX: 433

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
618-433 A Alton IL ALTNILAKDS0  9329 ILLINOIS BELL TEL CO 520      
618-433 0 Alton IL   9329 ILLINOIS BELL TEL CO 520      
618-433 1 Alton IL   792K CHARTER IP ENABLED SERVICES, LLC 520   2005-10-29   
618-433 2 Alton IL   9329 ILLINOIS BELL TEL CO 520      
618-433 3 Alton IL   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 520   2008-02-22   
618-433 4 Alton IL   9329 ILLINOIS BELL TEL CO 520      
618-433 5 Alton IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 520   2007-08-27   
618-433 6 Alton IL   9329 ILLINOIS BELL TEL CO 520      
618-433 7 Alton IL   9329 ILLINOIS BELL TEL CO 520      
618-433 8 Alton IL   792K CHARTER IP ENABLED SERVICES, LLC 520   2013-02-21   
618-433 9 Alton IL   792K CHARTER IP ENABLED SERVICES, LLC 520   2006-12-23   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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