Area Codes Phone Directory 312-940

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State	Major City	Time Zone
Illinois	Chicago	Central

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Example: (312) 940-5555 or 2012145555

Prefix	Primary City	Company	County	Usage	Introduced
312-940	Chicago, IL	Peerless Network Of Illinois	Cook	Landline	09/20/2013

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312-9400###

312-9401###

312-9402###

312-9403###

312-9404###

312-9405###

312-9406###

312-9407###

312-9408###

312-9409###