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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-520 Area Code & Prefix

(312) 520-0xxx
(312) 520-1xxx
(312) 520-2xxx
(312) 520-3xxx
(312) 520-4xxx
(312) 520-5xxx
(312) 520-6xxx
(312) 520-7xxx
(312) 520-8xxx
(312) 520-9xxx