Prefix Information

The prefix 400 is part of area code 399 serving Unknown, Unknown.

This exchange contains 10,000 possible phone numbers (399-400-0000 through 399-400-9999).

Browse Numbers in This Prefix

399-400-0000-0999 399-400-1000-1999 399-400-2000-2999 399-400-3000-3999 399-400-4000-4999 399-400-5000-5999 399-400-6000-6999 399-400-7000-7999 399-400-8000-8999 399-400-9000-9999

Sample Numbers

(399) 400-0000 (399) 400-1234 (399) 400-2000 (399) 400-3333 (399) 400-4444 (399) 400-5555 (399) 400-6000 (399) 400-7777 (399) 400-8888 (399) 400-9999