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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-309 Area Code & Prefix

(312) 309-0xxx
(312) 309-1xxx
(312) 309-2xxx
(312) 309-3xxx
(312) 309-4xxx
(312) 309-5xxx
(312) 309-6xxx
(312) 309-7xxx
(312) 309-8xxx
(312) 309-9xxx