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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-277 Area Code & Prefix

(312) 277-0xxx
(312) 277-1xxx
(312) 277-2xxx
(312) 277-3xxx
(312) 277-4xxx
(312) 277-5xxx
(312) 277-6xxx
(312) 277-7xxx
(312) 277-8xxx
(312) 277-9xxx