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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-720 Area Code & Prefix

(312) 720-0xxx
(312) 720-1xxx
(312) 720-2xxx
(312) 720-3xxx
(312) 720-4xxx
(312) 720-5xxx
(312) 720-6xxx
(312) 720-7xxx
(312) 720-8xxx
(312) 720-9xxx