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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-221 Area Code & Prefix

(312) 221-0xxx
(312) 221-1xxx
(312) 221-2xxx
(312) 221-3xxx
(312) 221-4xxx
(312) 221-5xxx
(312) 221-6xxx
(312) 221-7xxx
(312) 221-8xxx
(312) 221-9xxx