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).

  • 3127242300 | +1 312-724-2300 Illinois U.S.A.
  • 3127242301 | +1 312-724-2301 Illinois U.S.A.
  • 3127242302 | +1 312-724-2302 Illinois U.S.A.
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  • 3127242321 | +1 312-724-2321 Illinois U.S.A.
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  • 3127242367 | +1 312-724-2367 Illinois U.S.A.
  • 3127242368 | +1 312-724-2368 Illinois U.S.A.
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  • 3127242374 | +1 312-724-2374 Illinois U.S.A.
  • 3127242375 | +1 312-724-2375 Illinois U.S.A.
  • 3127242376 | +1 312-724-2376 Illinois U.S.A.
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  • 3127242394 | +1 312-724-2394 Illinois U.S.A.
  • 3127242395 | +1 312-724-2395 Illinois U.S.A.
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  • 3127242397 | +1 312-724-2397 Illinois U.S.A.
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