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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-540 Area Code & Prefix

(312) 540-0xxx
(312) 540-1xxx
(312) 540-2xxx
(312) 540-3xxx
(312) 540-4xxx
(312) 540-5xxx
(312) 540-6xxx
(312) 540-7xxx
(312) 540-8xxx
(312) 540-9xxx