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: 773 [Rate centres in NPA 773] [Dial plan for NPA 773]

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
773-770 A Chicago Zone 04-Humboldt IL CHCGILWUDS0  7765 OVATION COMMUNICATIONS OF ILLINOIS, INC. 358      
773-770 0 Chicago Zone 04-Humboldt IL   7765 OVATION COMMUNICATIONS OF ILLINOIS, INC. 358      
773-770 1 Chicago Zone 04-Humboldt IL   7765 OVATION COMMUNICATIONS OF ILLINOIS, INC. 358      
773-770 2 Chicago Zone 04-Humboldt IL   7765 OVATION COMMUNICATIONS OF ILLINOIS, INC. 358      
773-770 3 Chicago Zone 04-Humboldt IL   7607 COMCAST PHONE OF ILLINOIS, LLC DBA COMCO - IL 358   2012-03-12   
773-770 4 Chicago Zone 04-Humboldt IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2010-12-22   
773-770 5 Chicago Zone 04-Humboldt IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2011-01-01   
773-770 6 Chicago Zone 04-Humboldt IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2005-09-10   
773-770 7 Chicago Zone 04-Humboldt IL   9329 AMERITECH ILLINOIS 358   2002-02-21   
773-770 8 Chicago Zone 04-Humboldt IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2007-09-19   
773-770 9 Chicago Zone 04-Humboldt IL   8702 RCN TELECOM SERVICES OF ILLINOIS, INC. - IL 358   2000-10-12   

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.