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
773-394 A Chicago Zone 04-Humboldt IL CHCGILHBDS1  9329 AMERITECH ILLINOIS 358      
773-394 0 Chicago Zone 04-Humboldt IL   6529 T-MOBILE USA, INC. 358   2015-08-14   
773-394 1 Chicago Zone 04-Humboldt IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2018-04-17   
773-394 2 Chicago Zone 04-Humboldt IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2018-07-15   
773-394 3 Chicago Zone 04-Humboldt IL   6529 T-MOBILE USA, INC. 358   2015-08-14   
773-394 4 Chicago Zone 04-Humboldt IL   7607 COMCAST PHONE OF ILLINOIS, LLC DBA COMCO - IL 358   2014-08-15   
773-394 5 Chicago Zone 04-Humboldt IL   9329 AMERITECH ILLINOIS 358      
773-394 6 Chicago Zone 04-Humboldt IL   9329 AMERITECH ILLINOIS 358      
773-394 7 Chicago Zone 04-Humboldt IL   9329 AMERITECH ILLINOIS 358      
773-394 8 Chicago Zone 04-Humboldt IL   9329 AMERITECH ILLINOIS 358      
773-394 9 Chicago Zone 04-Humboldt IL   5562 METRO PCS, INC. 358   2014-10-12   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.