City of Chicago


815 Area code: Chicago, Cook - Landline

Directory Numbers

How to dial a U.S. number internationally:

  • Start with your country's exit code (e.g., 011 for the U.S. or Canada).
  • Dial the U.S. country code (+1).
  • Dial the 10-digit phone number (area code + local number).

  • 8153669000 | +1 815-366-9000 Illinois U.S.A.
  • 8153669001 | +1 815-366-9001 Illinois U.S.A.
  • 8153669002 | +1 815-366-9002 Illinois U.S.A.
  • 8153669003 | +1 815-366-9003 Illinois U.S.A.
  • 8153669004 | +1 815-366-9004 Illinois U.S.A.
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  • 8153669051 | +1 815-366-9051 Illinois U.S.A.
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