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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-233 Area Code & Prefix

(312) 233-0xxx
(312) 233-1xxx
(312) 233-2xxx
(312) 233-3xxx
(312) 233-4xxx
(312) 233-5xxx
(312) 233-6xxx
(312) 233-7xxx
(312) 233-8xxx
(312) 233-9xxx