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PHONE NUMBER PREFIXES IN THE 312 AREA CODE

Thousand digits 312-257 Area Code & Prefix

(312) 257-0xxx
(312) 257-1xxx
(312) 257-2xxx
(312) 257-3xxx
(312) 257-4xxx
(312) 257-5xxx
(312) 257-6xxx
(312) 257-7xxx
(312) 257-8xxx
(312) 257-9xxx