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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-923 Area Code & Prefix

(312) 923-0xxx
(312) 923-1xxx
(312) 923-2xxx
(312) 923-3xxx
(312) 923-4xxx
(312) 923-5xxx
(312) 923-6xxx
(312) 923-7xxx
(312) 923-8xxx
(312) 923-9xxx