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Collectives on Stack Overflow. Learn more. How do you detect Credit card type based on number? Ask Question. Asked 13 years, 2 months ago. Active 2 months ago. Viewed k times. Improve this question. NullUserException Andrew Edvalson Andrew Edvalson 7, 4 4 gold badges 25 25 silver badges 24 24 bronze badges. Using a regular expression. Check out this link for more information. The details are all on Wikipedia: en.
There's a good summary table in Wikipedia, at en. It's the first one to six digits that tell the type and issuer of the card. I wouldn't use a regex other than to pull out the first numeric group, you can generally tell just from the first 4 numbers in the US. Also before bothering to pay for clearing a charge run a Mod 10 checksum on the card number to make sure it could be legitimate.
Luhn algorithm — Dan Blair. Show 4 more comments. Active Oldest Votes. Improve this answer. ArtOfWarfare NO, no, no. You cannot rely on the lengths of card numbers; they can change at any time.
The only part of the card number you can rely on is the IIN which used to be called a BIN and which is a prefix of the number.
Additionally, you cannot detect Mastercard cards in the manner you suggest; that will only pick up a subset of the cards that are processed via the Mastercard system the main problem being Maestro cards, which have a variety of IIN prefixes. IINs are six digits long, so a complete card number must be 7 digits minimum and must pass the Luhn check. Relying on them being 16 digits long is unnecessary and creates a long-term maintenance risk.
I find it very hard to believe that some valid cards would not have a correct check digit according to the Luhn algorithm. It it used absolutely everywhere to check card numbers against simple typos and dumb fraud attempts.
Instead, I have observed some quite smart people simply not grasp the algorithm, and they just calculate it wrong. It's used by all cards in use. Show 28 more comments. Martijn Scheffer 7 7 silver badges 9 9 bronze badges. Anatoliy Anatoliy Doesn't work : — ShadeTreeDeveloper. ShadeTreeDeveloper just enter any value eg. I was hoping for something that would format as I type off the keyup event.
The fiddle does work when I enter a full number. I ended up writing this bit of code to do the input formatting and validation that I wanted. Thanks — Oleksandr IY. Show 1 more comment. Updated: 15th June as an ultimate solution currently Please note that I even give vote up for the one is top voted, but to make it clear these are the regexps actually works i tested it with thousands of real BIN codes.
William Desportes 11 11 silver badges 24 24 bronze badges. Janos Szabo Janos Szabo 1, 1 1 gold badge 14 14 silver badges 14 14 bronze badges. And please note, that this is only CC number detection and not validation. That is separated, should be a Luhn check Shouldn't the MasterCard check that itself? Assuming this list of test card numbers are valid anyway freeformatter. Show 2 more comments.
Usman Younas Usman Younas 1, 15 15 silver badges 20 20 bronze badges. Add a comment. Mastercard: length 16, prefix , dashes optional. Discover: length 16, prefix , dashes optional. American Express: length 15, prefix 34 or Diners: length 14, prefix 30, 36, or Rashy Rashy 9 9 silver badges 12 12 bronze badges.
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