Credit Card NumberRegex — Pattern, Examples & Code
^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|3[47][0-9]{13}|6(?:011|5[0-9]{2})[0-9]{12})$What it matches / doesn't match
| Matches ✅ | Does not match ❌ |
|---|---|
●4111111111111111 | ●1234567890123456 |
●5500005555555559 | ●4111 1111 1111 1111 |
●378282246310005 | ●411111111111 |
How it works
Matches major card networks: Visa (starts with 4, 13 or 16 digits), Mastercard (starts with 51–55, 16 digits), American Express (starts with 34 or 37, 15 digits), and Discover (starts with 6011 or 65, 16 digits). This checks format only — always run Luhn algorithm validation server-side to verify a card number is potentially valid.
Code Usage
JavaScript
const regex = /^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|3[47][0-9]{13}|6(?:011|5[0-9]{2})[0-9]{12})$/;
regex.test("4111111111111111"); // truePython
import re
pattern = re.compile(r'^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|3[47][0-9]{13}|6(?:011|5[0-9]{2})[0-9]{12})$')
bool(pattern.match("4111111111111111")) # TrueGo
import "regexp"
r := regexp.MustCompile(`^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|3[47][0-9]{13}|6(?:011|5[0-9]{2})[0-9]{12})$`)
r.MatchString("4111111111111111") // trueNeed a custom regex for a different use case?
Generate a custom regex with AI →FAQ
What does the Credit Card Number regex pattern match?
Matches major card networks: Visa (starts with 4, 13 or 16 digits), Mastercard (starts with 51–55, 16 digits), American Express (starts with 34 or 37, 15 digits), and Discover (starts with 6011 or 65, 16 digits). This checks format only — always run Luhn algorithm validation server-side to verify a card number is potentially valid.
How do I use the Credit Card Number regex in JavaScript?
const regex = /^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|3[47][0-9]{13}|6(?:011|5[0-9]{2})[0-9]{12})$/; regex.test("4111111111111111"); // true
Can I use the Credit Card Number regex in Python?
Yes. import re pattern = re.compile(r'^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|3[47][0-9]{13}|6(?:011|5[0-9]{2})[0-9]{12})$') bool(pattern.match("4111111111111111")) # True