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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-305 Area Code & Prefix

(312) 305-0xxx
(312) 305-1xxx
(312) 305-2xxx
(312) 305-3xxx
(312) 305-4xxx
(312) 305-5xxx
(312) 305-6xxx
(312) 305-7xxx
(312) 305-8xxx
(312) 305-9xxx