Your card number is on the front, usually in the center or lower half
The primary account number (PAN) — what most people call the card number — is a 15- or 16-digit code printed or embossed on the front of your card. On most cards, it runs horizontally across the middle or lower portion of the front face. The digits are usually grouped in sets of four, separated by spaces or printed as one continuous string.
The exact position varies by card issuer. Visa and Mastercard typically place the number in the lower half of the front. American Express places it on the front as well, but the layout is different from other card types. If you cannot locate it immediately, look for the longest sequence of numbers on the front — that is your card number.
You will need this number to make online purchases, set up recurring payments, or provide it over the phone to a merchant. It is the number you enter when a website asks for your "card number" at checkout.
Key Takeaways
- Your card number is a 15- or 16-digit code on the front of your card, usually in the center or lower half, grouped in sets of four.
- The three-digit security code (CVV or CVC) is on the back of most cards, in the signature strip area, and is never embossed.
- The expiration date appears on the front as two digits for the month and two for the year, and controls when the card stops working.
- Your cardholder name is printed on the front and must match your government ID for in-person transactions.
- Never share your card number, expiration date, or security code with anyone except the merchant you are paying.
The security code on the back is separate from your card number
The Card Verification Value (CVV) or Card Verification Code (CVC) is a three-digit number printed on the back of your card. It sits in or near the signature strip — the white or gray area where you sign the back. This code is never embossed; it is always printed flat on the surface.
The security code serves a different purpose than your card number. Merchants use it to verify that you physically have the card in your possession during online or phone transactions. Because it is printed on the back, not the front, a thief who photographs your front would not have this code.
American Express places its security code on the front, above the card number, and calls it the CID (Card Identification). The position is different, but the function is the same.
Expiration date and cardholder name are also on the front
Your expiration date appears on the front of the card as four digits: two for the month and two for the year. It is usually positioned near the bottom right, below or beside the card number. The format is typically MM/YY (for example, 03/27 means the card expires in March 2027).
The card stops working on the last day of the expiration month. If your card expires on 03/27, you can use it through March 31, 2027, but not on April 1, 2027. Your issuer will mail you a replacement card before the expiration date if your account is in good standing.
Your cardholder name is printed on the front, usually in the lower left area. This name must match the name on your government-issued ID for in-person transactions. Online and phone transactions typically do not require a name match, though some merchants ask for it as an additional verification step.
What each number means and why it matters
The 16-digit card number is not random. The first digit identifies the card network: Visa cards start with 4, Mastercard with 5, American Express with 3, and Discover with 6. The next five to seven digits identify your bank or card issuer. The remaining digits are your unique account number within that issuer's system.
The last digit is a check digit, calculated using the Luhn algorithm. Payment processors use this digit to catch typos or fraud before sending the transaction to your bank. If you mistype a single digit, the check digit will not match, and the transaction will be rejected immediately.
The expiration date and security code work together to reduce fraud. A stolen card number alone cannot be used online without the expiration date and CVV. A thief who finds a card receipt (which may show the last four digits) cannot complete a transaction without the security code from the back.
Where to find your card number if it is not embossed
Newer cards, especially those with chip technology, sometimes have the card number printed flat rather than embossed. The number is still on the front, in the same location as embossed numbers, but it is harder to feel with your finger. Look for the longest sequence of digits on the front face of the card.
If you cannot read the number on your physical card due to wear, fading, or damage, contact your card issuer. You can find the customer service number on your billing statement, on the back of your card, or on the issuer's website. They can read the number to you over the phone or send you a replacement card.
Do not attempt to guess or reconstruct your card number. If you need it for a transaction and cannot read it clearly, it is safer to request a replacement card or use a different payment method.
Protecting your card number from theft
Your card number, expiration date, and security code are sensitive information. Share them only with merchants you trust and only when you are initiating the transaction. Never provide these details in response to an unsolicited email, text, or phone call, even if the message appears to come from your bank.
When shopping online, verify that the website uses a secure connection. Look for "https://" at the beginning of the URL (not just "http://") and a padlock icon in the address bar. These indicate that your card information is encrypted during transmission.
If your card is lost or stolen, contact your issuer immediately. Most card networks limit your liability to $50 if you report the loss before fraudulent charges occur, and many issuers waive even that amount. The sooner you report it, the sooner they can cancel the card and issue a replacement.
Frequently Asked Questions
Is my card number the same as my account number?
No. Your card number is specific to that physical card. Your account number is the underlying bank account or credit line. If your card is replaced, you get a new card number, but your account remains the same. This is why old recurring payments must be updated when you receive a new card.
Can someone use my card number if they only have the front?
They can attempt an online transaction, but most merchants will reject it if the expiration date or security code is missing or incorrect. In-person transactions require the physical card. If you are concerned about a number you shared, contact your issuer to monitor for fraud or request a replacement card.
Why is the security code on the back instead of the front?
The back placement is intentional. It prevents someone who sees a photo of your front from having all the information needed for an online purchase. The security code is meant to verify that you physically possess the card, not just the number.
What should I do if I cannot read my card number clearly?
Contact your card issuer's customer service number, which appears on your billing statement or the back of your card. They can read the number to you or send a replacement. Do not attempt to guess or reconstruct the number, as this can lead to payment errors.
Do I need to memorize my card number?
No. Most payment systems store your card information securely after the first transaction, so you do not need to memorize it. For security, it is actually better not to memorize it, as this reduces the risk of accidentally sharing it verbally.