Check Debit Card Balance

I have a MasterCard debit card. Can I check the balance online?

I assume you are talking about your standard debit card that is linked to your checking account. If so, your bank probably has a website where you can check the balance checking (which is in turn the balance of your debit card). You may have to register on the site if it is new to you.

If you speak a kind of gift card, there should be an 800 number and / or a website on the back of the card.

If you have a bank account, the answer is yes. Any other debit card, I do not know.