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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-270 Area Code & Prefix

(312) 270-0xxx
(312) 270-1xxx
(312) 270-2xxx
(312) 270-3xxx
(312) 270-4xxx
(312) 270-5xxx
(312) 270-6xxx
(312) 270-7xxx
(312) 270-8xxx
(312) 270-9xxx