Prefix (312) 231- is primarily in Chicago, Illinois, and includes 1,512 phone numbers.

Area Code:

312

City/State:

Chicago, IL

ZIP (primary):

60048

County:

Cook

Type:

Mobile

Company/Carrier:

New Cingular Wireless Pcs, Llc - Il

Time Zone:

Central (11:23 am)

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Phone numbers in (312) 231-