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.
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Chicago Zone 06-Lawndale, IL

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
773-762 4 CHCGILLDDS0  9329 ILLINOIS BELL TEL CO 358      
773-762 5 CHCGILLDDS0  9329 ILLINOIS BELL TEL CO 358      
773-762 6 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2021-10-11   
773-762 7 CHCGILLDDS0  9329 ILLINOIS BELL TEL CO 358      
773-762 8 CHCGILLDDS0  9329 ILLINOIS BELL TEL CO 358      
773-762 9 RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2014-10-09   

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Last updated: Sat, 02 May 2026 12:20:53 UTC

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