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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-728 Area Code & Prefix

(312) 728-0xxx
(312) 728-1xxx
(312) 728-2xxx
(312) 728-3xxx
(312) 728-4xxx
(312) 728-5xxx
(312) 728-6xxx
(312) 728-7xxx
(312) 728-8xxx
(312) 728-9xxx