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: 638

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
773-638 A Chicago Zone 06-Kedzie IL CHCGILKEDS0  9329 ILLINOIS BELL TEL CO 358      
773-638 0 Chicago Zone 06-Kedzie IL CHCGILKEDS0  9329 ILLINOIS BELL TEL CO 358      
773-638 1 Chicago Zone 06-Kedzie IL CHCGILKEDS0  9329 ILLINOIS BELL TEL CO 358      
773-638 2 Chicago Zone 06-Kedzie IL CHCGILKEDS0  9329 ILLINOIS BELL TEL CO 358      
773-638 3 Chicago Zone 06-Kedzie IL CHCGILKEDS0  9329 ILLINOIS BELL TEL CO 358      
773-638 4 Chicago Zone 06-Kedzie IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358      
773-638 5 Chicago Zone 06-Kedzie IL CHCGILKEDS0  9329 ILLINOIS BELL TEL CO 358      
773-638 6 Chicago Zone 06-Kedzie IL CHCGILKEDS0  9329 ILLINOIS BELL TEL CO 358      
773-638 7 Chicago Zone 06-Kedzie IL CHCGILWUTMD  516J TON80 COMMUNICATIONS, LLC 358      
773-638 8 Chicago Zone 06-Kedzie IL CHCGILKEDS0  9329 ILLINOIS BELL TEL CO 358      
773-638 9 Chicago Zone 06-Kedzie IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.