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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-378 Area Code & Prefix

(312) 378-0xxx
(312) 378-1xxx
(312) 378-2xxx
(312) 378-3xxx
(312) 378-4xxx
(312) 378-5xxx
(312) 378-6xxx
(312) 378-7xxx
(312) 378-8xxx
(312) 378-9xxx