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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-523 Area Code & Prefix

(312) 523-0xxx
(312) 523-1xxx
(312) 523-2xxx
(312) 523-3xxx
(312) 523-4xxx
(312) 523-5xxx
(312) 523-6xxx
(312) 523-7xxx
(312) 523-8xxx
(312) 523-9xxx