See here. There is a link to an Excel sheet that does this.

http://www.beachnet.com/~hstiles/cardtype.html



"
. com wrote in message
...
I was hoping to be able to do a MOD-10 check on a credit card number in
Excel
2000. If it can't be done in Excel itself, is there a macro that can be
done
in Visual Basic that can run in Excel 2000?