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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-780 Area Code & Prefix

(312) 780-0xxx
(312) 780-1xxx
(312) 780-2xxx
(312) 780-3xxx
(312) 780-4xxx
(312) 780-5xxx
(312) 780-6xxx
(312) 780-7xxx
(312) 780-8xxx
(312) 780-9xxx