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 FileMaker Pro Custom Functions

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CreditCardName ( CreditCardNumber )

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  Average rating: 4.3  (28 votes)
  Discuss this Custom Function

Geoff Wells, DataIsland Software LLC

Returns the CC type from the number

Sample Input:
Sample Output:
Invalid Card Number

 Then copy & paste into FileMaker Advanced's Edit Custom Function window.

Click here to copy To Clip Manager if you have myFMbutler's Clip Manager installed


Takes a 15 or 16 digit credit card number, with or without dashes and returns the credit card type (Visa, Mastercard etc. ). Numbers are checked using the Luhn Mod-10 algorithm.

Note: these functions are not guaranteed or supported by Please contact the individual developer with any questions or problems.

This is my Custom Function and I want to edit it


How can i get the 3 luhn function in file...
i need this code but its telling me that the lunh function can not be found...thanks...

Locke, usa
January 31, 2009 9:17am

Been using this for a while but just came up with a VISA number that it claims is not valid. The VISA payment for the number in question was authorized so it must be correct.

Begins with 4313 if that helps...

Harold Sookman, Montreal
November 15, 2011 12:28pm

Geoff, if you are still maintaining this function, I believe it's outdated according to ber_.28IIN.29

Looks like a great function but it's unusable without the current credit card numbering schemes.

Rob, Cleveland, OH
November 15, 2016 4:49am

I've revised the function to handle 13-19 digit card numbers and to remove brands and ranges that are no longer valid per the information at the Wikipedia link posted above by Rob. The function has been reposted at "CreditCardType" at

Will Loving, Northampton, MA
May 05, 2017 5:10pm

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