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: 855

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
773-855 A Chicago Zone 07-Oakland IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-855 0 Chicago Zone 07-Oakland IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-855 1 Chicago Zone 07-Oakland IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-855 2 Chicago Zone 07-Oakland IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-855 3 Chicago Zone 07-Oakland IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-855 4 Chicago Zone 07-Oakland IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-855 5 Chicago Zone 07-Oakland IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-855 6 Chicago Zone 07-Oakland IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-855 7 Chicago Zone 07-Oakland IL CHCGIL24DS3  4604 FIRST COMMUNICATIONS, LLC - IL 358   2006-07-03   
773-855 8 Chicago Zone 07-Oakland IL CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2006-06-23   
773-855 9 Chicago Zone 07-Oakland IL CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2006-07-05   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.