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).

  • 3124272400 | +1 312-427-2400 Illinois U.S.A.
  • 3124272401 | +1 312-427-2401 Illinois U.S.A.
  • 3124272402 | +1 312-427-2402 Illinois U.S.A.
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  • 3124272411 | +1 312-427-2411 Illinois U.S.A.
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  • 3124272424 | +1 312-427-2424 Illinois U.S.A.
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  • 3124272455 | +1 312-427-2455 Illinois U.S.A.
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  • 3124272466 | +1 312-427-2466 Illinois U.S.A.
  • 3124272467 | +1 312-427-2467 Illinois U.S.A.
  • 3124272468 | +1 312-427-2468 Illinois U.S.A.
  • 3124272469 | +1 312-427-2469 Illinois U.S.A.
  • 3124272470 | +1 312-427-2470 Illinois U.S.A.
  • 3124272471 | +1 312-427-2471 Illinois U.S.A.
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  • 3124272474 | +1 312-427-2474 Illinois U.S.A.
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  • 3124272476 | +1 312-427-2476 Illinois U.S.A.
  • 3124272477 | +1 312-427-2477 Illinois U.S.A.
  • 3124272478 | +1 312-427-2478 Illinois U.S.A.
  • 3124272479 | +1 312-427-2479 Illinois U.S.A.
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  • 3124272481 | +1 312-427-2481 Illinois U.S.A.
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  • 3124272499 | +1 312-427-2499 Illinois U.S.A.