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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-300 Area Code & Prefix

(312) 300-0xxx
(312) 300-1xxx
(312) 300-2xxx
(312) 300-3xxx
(312) 300-4xxx
(312) 300-5xxx
(312) 300-6xxx
(312) 300-7xxx
(312) 300-8xxx
(312) 300-9xxx