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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-729 Area Code & Prefix

(312) 729-0xxx
(312) 729-1xxx
(312) 729-2xxx
(312) 729-3xxx
(312) 729-4xxx
(312) 729-5xxx
(312) 729-6xxx
(312) 729-7xxx
(312) 729-8xxx
(312) 729-9xxx