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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-921 Area Code & Prefix

(312) 921-0xxx
(312) 921-1xxx
(312) 921-2xxx
(312) 921-3xxx
(312) 921-4xxx
(312) 921-5xxx
(312) 921-6xxx
(312) 921-7xxx
(312) 921-8xxx
(312) 921-9xxx