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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-503 Area Code & Prefix

(312) 503-0xxx
(312) 503-1xxx
(312) 503-2xxx
(312) 503-3xxx
(312) 503-4xxx
(312) 503-5xxx
(312) 503-6xxx
(312) 503-7xxx
(312) 503-8xxx
(312) 503-9xxx