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).

  • 8153742100 | +1 815-374-2100 Illinois U.S.A.
  • 8153742101 | +1 815-374-2101 Illinois U.S.A.
  • 8153742102 | +1 815-374-2102 Illinois U.S.A.
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  • 8153742110 | +1 815-374-2110 Illinois U.S.A.
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  • 8153742178 | +1 815-374-2178 Illinois U.S.A.
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  • 8153742197 | +1 815-374-2197 Illinois U.S.A.
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