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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-274 Area Code & Prefix

(312) 274-0xxx
(312) 274-1xxx
(312) 274-2xxx
(312) 274-3xxx
(312) 274-4xxx
(312) 274-5xxx
(312) 274-6xxx
(312) 274-7xxx
(312) 274-8xxx
(312) 274-9xxx