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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-840 Area Code & Prefix

(312) 840-0xxx
(312) 840-1xxx
(312) 840-2xxx
(312) 840-3xxx
(312) 840-4xxx
(312) 840-5xxx
(312) 840-6xxx
(312) 840-7xxx
(312) 840-8xxx
(312) 840-9xxx