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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-491 Area Code & Prefix

(312) 491-0xxx
(312) 491-1xxx
(312) 491-2xxx
(312) 491-3xxx
(312) 491-4xxx
(312) 491-5xxx
(312) 491-6xxx
(312) 491-7xxx
(312) 491-8xxx
(312) 491-9xxx