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PHONE NUMBER PREFIXES IN THE 231 AREA CODE

Thousand digits 231-399 Area Code & Prefix

(231) 399-0xxx
(231) 399-1xxx
(231) 399-2xxx
(231) 399-3xxx
(231) 399-4xxx
(231) 399-5xxx
(231) 399-6xxx
(231) 399-7xxx
(231) 399-8xxx
(231) 399-9xxx