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: 691

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
773-691 A Chicago Zone 08-Portsmouth IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358      
773-691 0 Chicago Zone 08-Portsmouth IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358   2007-08-24   
773-691 1 Chicago Zone 08-Portsmouth IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358   2007-08-24   
773-691 2 Chicago Zone 08-Portsmouth IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358   2007-08-24   
773-691 3 Chicago Zone 08-Portsmouth IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358   2007-09-28   
773-691 4 Chicago Zone 08-Portsmouth IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358   2007-09-28   
773-691 5 Chicago Zone 08-Portsmouth IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358   2007-09-28   
773-691 6 Chicago Zone 08-Portsmouth IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358   2007-09-28   
773-691 7 Chicago Zone 08-Portsmouth IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358   2007-09-28   
773-691 8 Chicago Zone 08-Portsmouth IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358   2007-09-28   
773-691 9 Chicago Zone 08-Portsmouth IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358   2007-08-24   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.