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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-688 Area Code & Prefix

(312) 688-0xxx
(312) 688-1xxx
(312) 688-2xxx
(312) 688-3xxx
(312) 688-4xxx
(312) 688-5xxx
(312) 688-6xxx
(312) 688-7xxx
(312) 688-8xxx
(312) 688-9xxx