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).

  • 3122742400 | +1 312-274-2400 Illinois U.S.A.
  • 3122742401 | +1 312-274-2401 Illinois U.S.A.
  • 3122742402 | +1 312-274-2402 Illinois U.S.A.
  • 3122742403 | +1 312-274-2403 Illinois U.S.A.
  • 3122742404 | +1 312-274-2404 Illinois U.S.A.
  • 3122742405 | +1 312-274-2405 Illinois U.S.A.
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  • 3122742409 | +1 312-274-2409 Illinois U.S.A.
  • 3122742410 | +1 312-274-2410 Illinois U.S.A.
  • 3122742411 | +1 312-274-2411 Illinois U.S.A.
  • 3122742412 | +1 312-274-2412 Illinois U.S.A.
  • 3122742413 | +1 312-274-2413 Illinois U.S.A.
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  • 3122742416 | +1 312-274-2416 Illinois U.S.A.
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  • 3122742418 | +1 312-274-2418 Illinois U.S.A.
  • 3122742419 | +1 312-274-2419 Illinois U.S.A.
  • 3122742420 | +1 312-274-2420 Illinois U.S.A.
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  • 3122742435 | +1 312-274-2435 Illinois U.S.A.
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  • 3122742470 | +1 312-274-2470 Illinois U.S.A.
  • 3122742471 | +1 312-274-2471 Illinois U.S.A.
  • 3122742472 | +1 312-274-2472 Illinois U.S.A.
  • 3122742473 | +1 312-274-2473 Illinois U.S.A.
  • 3122742474 | +1 312-274-2474 Illinois U.S.A.
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  • 3122742478 | +1 312-274-2478 Illinois U.S.A.
  • 3122742479 | +1 312-274-2479 Illinois U.S.A.
  • 3122742480 | +1 312-274-2480 Illinois U.S.A.
  • 3122742481 | +1 312-274-2481 Illinois U.S.A.
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