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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-870 Area Code & Prefix

(312) 870-0xxx
(312) 870-1xxx
(312) 870-2xxx
(312) 870-3xxx
(312) 870-4xxx
(312) 870-5xxx
(312) 870-6xxx
(312) 870-7xxx
(312) 870-8xxx
(312) 870-9xxx