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: 312 [Rate centres in NPA 312] [Dial plan for NPA 312]

NXX: 547

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-547 A Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-547 0 Chicago Zone 01-Wabash IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358      
312-547 1 Chicago Zone 01-Wabash IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358      
312-547 2 Chicago Zone 01-Wabash IL CHCGIL24DS0  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-547 3 Chicago Zone 01-Wabash IL CHCGIL24DS0  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-547 4 Chicago Zone 01-Wabash IL CHCGIL24DS0  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-547 5 Chicago Zone 01-Wabash IL CHCGIL24DS0  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-547 6 Chicago Zone 01-Wabash IL CHCGIL24DS0  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-547 7 Chicago Zone 01-Wabash IL CHCGIL24DS0  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-547 8 Chicago Zone 01-Wabash IL CHCGIL24DS0  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-547 9 Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.