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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-554 Area Code & Prefix

(312) 554-0xxx
(312) 554-1xxx
(312) 554-2xxx
(312) 554-3xxx
(312) 554-4xxx
(312) 554-5xxx
(312) 554-6xxx
(312) 554-7xxx
(312) 554-8xxx
(312) 554-9xxx