The 16-digit number (often grouped into four’s) found on the front of your debit card is known as the Card number. We highlight the numbers you’d commonly find on a debit card, what they mean, their importance and where you can find them. And with all of the digits, funds in your account can be accessed. With some of these digits, your account information can easily be accessed. Depending on the card material, preference of financial institution, and some other factors, these digits could either be printed on a debit card or carved into it.īasically, the numbers you’d find on a debit card have two purposes: account identification and security. One thing both cards have in common, however, are the digits on them. While majority of debit cards are made out of plastic, some are also made entirely of metal.