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.

NPA: 618 [Rate centres in NPA 618] [Dial plan for NPA 618]

NXX: 596

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
618-596 A Zeigler IL ZGLRILXFRS1  1015 FRONTIER NORTH, INC. - IL 362      
618-596 0 Zeigler IL   9915 DELTA COMMS, LLC DBA CLEARWAVE COMMUNICATIONS - IL 362   2003-02-03   
618-596 1 Zeigler IL   224C ONVOY, LLC 362   2019-09-08   
618-596 2 Zeigler IL   1015 FRONTIER NORTH, INC. - IL 362      
618-596 3 Zeigler IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 362   2005-02-14   
618-596 4 Zeigler IL   1015 FRONTIER NORTH, INC. - IL 362      
618-596 5 Zeigler IL   224C ONVOY, LLC 362   2018-10-01   
618-596 6 Zeigler IL   1015 FRONTIER NORTH, INC. - IL 362      
618-596 7 Zeigler IL   846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 362   2010-05-09   
618-596 8 Zeigler IL   1015 FRONTIER NORTH, INC. - IL 362      
618-596 9 Zeigler IL   073H TELNYX LLC 362   2020-07-20   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.