Prefix Information

The prefix 400 is part of area code 603 serving Manchester, New Hampshire.

This exchange contains 10,000 possible phone numbers (603-400-0000 through 603-400-9999).

Browse Numbers in This Prefix

603-400-0000-0999 603-400-1000-1999 603-400-2000-2999 603-400-3000-3999 603-400-4000-4999 603-400-5000-5999 603-400-6000-6999 603-400-7000-7999 603-400-8000-8999 603-400-9000-9999

Sample Numbers

(603) 400-0000 (603) 400-1234 (603) 400-2000 (603) 400-3333 (603) 400-4444 (603) 400-5555 (603) 400-6000 (603) 400-7777 (603) 400-8888 (603) 400-9999