Question 1

What is the regex pattern for credit card number?

Accepted Answer

The regex pattern for credit card number is: ^(?:4\d{12}(?:\d{3})?|5[1-5]\d{14}|3[47]\d{13}|3(?:0[0-5]|[68]\d)\d{11}|6(?:011|5\d{2})\d{12})$.

Question 2

How does the credit card number regex work?

Accepted Answer

4\d{12}(?:\d{3})?: Visa: starts with 4, 13 or 16 digits. 5[1-5]\d{14}: Mastercard: starts with 51-55, 16 digits. 3[47]\d{13}: Amex: starts with 34 or 37, 15 digits. 3(?:0[0-5]|[68]\d)\d{11}: Diners Club: starts with 300-305 or 36/38, 14 digits. 6(?:011|5\d{2})\d{12}: Discover: starts with 6011 or 65, 16 digits.

Input	Match?
4111111111111111	Match
5500000000000004	Match
371449635398431	Match
1234567890123456	No match
411111111111111	No match

Regex for Credit Card Number

Pattern Breakdown

Test Examples

Common Use Cases

Variations

Other Regex Patterns

Token	Explanation
4\d{12}(?:\d{3})?	Visa: starts with 4, 13 or 16 digits
5[1-5]\d{14}	Mastercard: starts with 51-55, 16 digits
3[47]\d{13}	Amex: starts with 34 or 37, 15 digits
3(?:0[0-5]\|[68]\d)\d{11}	Diners Club: starts with 300-305 or 36/38, 14 digits
6(?:011\|5\d{2})\d{12}	Discover: starts with 6011 or 65, 16 digits