Prefix Information

The prefix 400 is part of area code 608 serving Madison, Wisconsin.

This exchange contains 10,000 possible phone numbers (608-400-0000 through 608-400-9999).

Browse Numbers in This Prefix

608-400-0000-0999 608-400-1000-1999 608-400-2000-2999 608-400-3000-3999 608-400-4000-4999 608-400-5000-5999 608-400-6000-6999 608-400-7000-7999 608-400-8000-8999 608-400-9000-9999

Sample Numbers

(608) 400-0000 (608) 400-1234 (608) 400-2000 (608) 400-3333 (608) 400-4444 (608) 400-5555 (608) 400-6000 (608) 400-7777 (608) 400-8888 (608) 400-9999