All the card numbers start 5424 (Citibank MasterCard) and there are actually onl... (2024)

jgrahamc on April 23, 2010 | parent | context | favorite | on: Blippy Publishes User Credit Card Numbers


All the card numbers start 5424 (Citibank MasterCard) and there are actually only a small number of different card numbers.

I wonder if this is something to do with test data.

All the card numbers start 5424 (Citibank MasterCard) and there are actually onl... (1)

niyazpk on April 23, 2010 | next [–]


Anyway what were they testing? The "publish_credit_card_numbers" module?

All the card numbers start 5424 (Citibank MasterCard) and there are actually onl... (2)

jgilliam on April 23, 2010 | prev | next [–]


5424 is a MasterCard test number. http://www.topbits.com/test-credit-card-numbers.html

edit: I was wrong, it's the full number that's a test number. 5424 0000 0000 0015

All the card numbers start 5424 (Citibank MasterCard) and there are actually onl... (3)

metra on April 23, 2010 | parent | next [–]


So you're telling me that I've been using a test card for the past 5 years? I hope not.

The two numbers listed on that site are test numbers. 5424 is a very common MasterCard prefix.

All the card numbers start 5424 (Citibank MasterCard) and there are actually onl... (4)

joshu on April 23, 2010 | parent | prev | next [–]


I'm reasonably sure that's not true. Perhaps the whole 16 digit sequences listed there is a test number.

All the card numbers start 5424 (Citibank MasterCard) and there are actually onl... (5)

jgilliam on April 23, 2010 | root | parent | next [–]


You are right, I was wrong. It's the full number that's a test number. 5424 0000 0000 0015

All the card numbers start 5424 (Citibank MasterCard) and there are actually onl... (6)

AndrewHampton on April 23, 2010 | parent | prev | next [–]


There are the only 4 numbers in the results. Although I do see a few in this format XXXXXXXXXXXX2376.

(Edited to remove actual numbers in case they're not test numbers)

All the card numbers start 5424 (Citibank MasterCard) and there are actually onl... (7)

BobbyH on April 23, 2010 | parent | prev | next [–]


My actual MasterCard # starts with 5424.

All the card numbers start 5424 (Citibank MasterCard) and there are actually onl... (8)

iamelgringo on April 23, 2010 | parent | prev | next [–]


According to the link that you posted, 5424 0000 0000 0015 is a test number. That's not the same number that I'm seeing in the Google results.

All the card numbers start 5424 (Citibank MasterCard) and there are actually onl... (9)

WesleyJohnson on April 23, 2010 | prev [–]


5424 is also used outside of Citibank as my old debit card (with a MasterCard logo) from Fifth Third Bank started with 5424. I don't believe they're affiliated with Citibank, but I could be mistaken.

All the card numbers start 5424 (Citibank MasterCard) and there are actually onl... (2024)
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