How to verify an ecommerce website without using a real credit card

Question: I am setting up my web site to take Credit Cards myself. What numbers can I use to test it?

Use these numbers in test mode:

American Express
341-1111-1111-1111
370-0000-0000-0002
378-2822-4631-0005

Discover
6011-0000-0000-0012
6011-6011-6011-6611

MasterCard

5431-1111-1111-1111
5555-5555-5555-4444

Visa 4111-1111-1111-1111