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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-290 Area Code & Prefix

(312) 290-0xxx
(312) 290-1xxx
(312) 290-2xxx
(312) 290-3xxx
(312) 290-4xxx
(312) 290-5xxx
(312) 290-6xxx
(312) 290-7xxx
(312) 290-8xxx
(312) 290-9xxx