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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-621 Area Code & Prefix

(312) 621-0xxx
(312) 621-1xxx
(312) 621-2xxx
(312) 621-3xxx
(312) 621-4xxx
(312) 621-5xxx
(312) 621-6xxx
(312) 621-7xxx
(312) 621-8xxx
(312) 621-9xxx