Credit card numbers for testing...

American Express
378282246310005
371449635398431

American Express Corporate
378734493671000

Diners Club
30569309025904
38520000023237

Discover
6011111111111117
6011000990139424

JCB
3530111333300000
3566002020360505

MasterCard
5555555555554444
5105105105105100

Visa
4111111111111111
4012888888881881
4222222222222