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).

  • 3124272300 | +1 312-427-2300 Illinois U.S.A.
  • 3124272301 | +1 312-427-2301 Illinois U.S.A.
  • 3124272302 | +1 312-427-2302 Illinois U.S.A.
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  • 3124272311 | +1 312-427-2311 Illinois U.S.A.
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  • 3124272367 | +1 312-427-2367 Illinois U.S.A.
  • 3124272368 | +1 312-427-2368 Illinois U.S.A.
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  • 3124272370 | +1 312-427-2370 Illinois U.S.A.
  • 3124272371 | +1 312-427-2371 Illinois U.S.A.
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  • 3124272374 | +1 312-427-2374 Illinois U.S.A.
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  • 3124272376 | +1 312-427-2376 Illinois U.S.A.
  • 3124272377 | +1 312-427-2377 Illinois U.S.A.
  • 3124272378 | +1 312-427-2378 Illinois U.S.A.
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  • 3124272381 | +1 312-427-2381 Illinois U.S.A.
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  • 3124272399 | +1 312-427-2399 Illinois U.S.A.