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PHONE NUMBER PREFIXES IN THE 303 AREA CODE

Thousand digits 303-399 Area Code & Prefix

(303) 399-0xxx
(303) 399-1xxx
(303) 399-2xxx
(303) 399-3xxx
(303) 399-4xxx
(303) 399-5xxx
(303) 399-6xxx
(303) 399-7xxx
(303) 399-8xxx
(303) 399-9xxx