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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-234 Area Code & Prefix

(312) 234-0xxx
(312) 234-1xxx
(312) 234-2xxx
(312) 234-3xxx
(312) 234-4xxx
(312) 234-5xxx
(312) 234-6xxx
(312) 234-7xxx
(312) 234-8xxx
(312) 234-9xxx