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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-691 Area Code & Prefix

(312) 691-0xxx
(312) 691-1xxx
(312) 691-2xxx
(312) 691-3xxx
(312) 691-4xxx
(312) 691-5xxx
(312) 691-6xxx
(312) 691-7xxx
(312) 691-8xxx
(312) 691-9xxx