City of Chicago


312 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).

  • 3127262300 | +1 312-726-2300 Illinois U.S.A.
  • 3127262301 | +1 312-726-2301 Illinois U.S.A.
  • 3127262302 | +1 312-726-2302 Illinois U.S.A.
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  • 3127262377 | +1 312-726-2377 Illinois U.S.A.
  • 3127262378 | +1 312-726-2378 Illinois U.S.A.
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