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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-397 Area Code & Prefix

(312) 397-0xxx
(312) 397-1xxx
(312) 397-2xxx
(312) 397-3xxx
(312) 397-4xxx
(312) 397-5xxx
(312) 397-6xxx
(312) 397-7xxx
(312) 397-8xxx
(312) 397-9xxx