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: 618 [Rate centres in NPA 618] [Dial plan for NPA 618]

NXX: 789

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
618-789 A Collinsville IL STLVMOOH6MD  6529 T-MOBILE USA, INC. 520      
618-789 0 Collinsville IL   6529 T-MOBILE USA, INC. 520      
618-789 1 Collinsville IL   6529 T-MOBILE USA, INC. 520      
618-789 2 Collinsville IL   6529 T-MOBILE USA, INC. 520      
618-789 3 Collinsville IL   6529 T-MOBILE USA, INC. 520      
618-789 4 Collinsville IL   6529 T-MOBILE USA, INC. 520      
618-789 5 Collinsville IL   6529 T-MOBILE USA, INC. 520      
618-789 6 Collinsville IL   6529 T-MOBILE USA, INC. 520      
618-789 7 Collinsville IL   6529 T-MOBILE USA, INC. 520      
618-789 8 Collinsville IL   6529 T-MOBILE USA, INC. 520   2014-12-04   
618-789 9 Collinsville IL   6529 T-MOBILE USA, INC. 520      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.