Determine credit card type by number?

2018-06-03 14:52:09

Can credit card type be determined solely from the credit card number?

Is this recommended or always ask client for the type of credit card they're using?

I googled about it and found this algorithm: http://cuinl.tripod.com/Tips/o-1.htm , is this reliable?

Thanks

Yes, the site you mentioned is correct. Many sites, incl. Google Checkout I believe, rely on automatic detection of the card type. It's convenient, makes the UI less cluttered (one less input box) and saves time. Go ahead!

I have heard one good reason to make them pick (even though you can figure it out). So that they know the list of credit cards you accept.

As a consumer, I hate choosing a card first. I want to just start typing the number.

This issue is discussed in Wroblewski's Web Form Design on pages 153-154. It's in the section "Removing Questions" of the chapter "Unnecessary Inputs." The example given is Paypal, which highlights the type of card when you've typed in your number.

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