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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Switch: IRNGILXCRS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
217-533 A Irving IL 1037 ILLINOIS CONSOLIDATED TEL. CO. 976      
217-533 0 Irving IL 1037 ILLINOIS CONSOLIDATED TEL. CO. 976      
217-533 4 Irving IL 1037 ILLINOIS CONSOLIDATED TEL. CO. 976      
217-533 5 Irving IL 1037 ILLINOIS CONSOLIDATED TEL. CO. 976      
217-533 6 Irving IL 1037 ILLINOIS CONSOLIDATED TEL. CO. 976      
217-533 7 Irving IL 1037 ILLINOIS CONSOLIDATED TEL. CO. 976      
217-533 8 Irving IL 1037 ILLINOIS CONSOLIDATED TEL. CO. 976      
217-533 9 Irving IL 1037 ILLINOIS CONSOLIDATED TEL. CO. 976      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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