Area Codes Phone Directory 312-342

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State	Major City	Time Zone
Illinois	Chicago	Central

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Example: (312) 342-5555 or 2012145555

Prefix	Primary City	Company	County	Usage	Introduced
312-342	Chicago, IL	New Cingular Wireless PCS	Cook	Cell Number	06/30/2001

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312-3420###

312-3421###

312-3422###

312-3423###

312-3424###

312-3425###

312-3426###

312-3427###

312-3428###

312-3429###