Open the Wallet app on your iPhone
Tap the card you want to view
Tap the three dots in the top-right corner
Tap Card Number or Card Details
Authenticate with Face ID, Touch ID, or your passcode
View the last four digits of the card number
Note that Apple Pay does not show the full card number for security reasons
Check the physical card or your bank’s app or website for the full card number
Contact your card issuer if you need the full card number or a replacement card