Area Codes Phone Directory 312-315

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State	Major City	Time Zone
Illinois	Chicago	Central

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Example: (312) 315-5555 or 2012145555

Prefix	Primary City	Company	County	Usage	Introduced
312-315	Chicago, IL	New Cingular Wireless PCS	Cook	Cell Number	11/11/2003

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312-3150###

312-3151###

312-3152###

312-3153###

312-3154###

312-3155###

312-3156###

312-3157###

312-3158###

312-3159###