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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-620 Area Code & Prefix

(312) 620-0xxx
(312) 620-1xxx
(312) 620-2xxx
(312) 620-3xxx
(312) 620-4xxx
(312) 620-5xxx
(312) 620-6xxx
(312) 620-7xxx
(312) 620-8xxx
(312) 620-9xxx