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: 344

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
773-344 A Chicago Zone 10-Beverly IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-344 0 Chicago Zone 10-Beverly IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358   2004-02-20   
773-344 1 Chicago Zone 10-Beverly IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358   2003-10-30   
773-344 2 Chicago Zone 10-Beverly IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358   2003-10-30   
773-344 3 Chicago Zone 10-Beverly IL CHCGILWUX1X  7765 OVATION COMMUNICATIONS OF ILLINOIS, INC. 358   2003-09-30   
773-344 4 Chicago Zone 10-Beverly IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358   2004-02-20   
773-344 5 Chicago Zone 10-Beverly IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358   2004-02-20   
773-344 6 Chicago Zone 10-Beverly IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358   2004-04-02   
773-344 7 Chicago Zone 10-Beverly IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358   2004-02-20   
773-344 8 Chicago Zone 10-Beverly IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358   2004-02-20   
773-344 9 Chicago Zone 10-Beverly IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.