This is a tip on how to check CCs. 1-800-jack-off used to be a good way to check if CCs are alive or not. But after checking a card and it wasn't approved on 1-800-jack-off, I went on southwest.com/giftcard and double checked, and it was approved. You can enter any amount when you purchase a giftcard. Between $1 and $1000. Make sure the CVV is correct, the billing info doesn't matter. Use any billing info. If the CC is alive and has the balance, it will charge the amount.