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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-299 Area Code & Prefix

(312) 299-0xxx
(312) 299-1xxx
(312) 299-2xxx
(312) 299-3xxx
(312) 299-4xxx
(312) 299-5xxx
(312) 299-6xxx
(312) 299-7xxx
(312) 299-8xxx
(312) 299-9xxx