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Python Credit Card Generator

CCNumGen is a Python 3.9 class that uses the Luhn Algorithm to generate theoretically valid credit card numbers with CVV and expiration dates.

  • It can generate Amex, Discover, MC, Visa 13, and Visa 16 cards.
  • It generates 3 or 4 digit CVV numbers, depending on the card type.
  • It generates an expiration date that is 1 to 3 years from today.
  • It prints each card to the console.
  • It captures cards in a list of dictionaries.

Adapted from: https://stackoverflow.com/questions/59232327/python-how-to-always-generate-valid-luhn-numbers

Do the numbers work?

These are theoretical cards meant for testing the pre-checks that happen on a payment screen before payment is submitted. This utility does not generate real-world card information. For example, real CSV numbers are generated using an algorithm tied to the card number and other data points - something this utility can't do.

Need different card numbers?

Sometimes for testing you need card numbers with specific prefixes. CCNumGen is easy to extend.

  • Name the new card type in the CCNumGen class -> card_types list.
  • Define the new card in the CC class -> CCDATA dictionary.

Usage

CCNumGen generates 5 types of cards. The second argument is the number of cards to generate.

amex = CCNumGen('amex', 2)
discover = CCNumGen('discover', 2)
mc = CCNumGen('mc', 2)
visa13 = CCNumGen('visa13', 2)
visa16 = CCNumGen('visa16', 2)

Each card is printed to the console.

---------------------------
Type: amex
Number: 372672737435387
CVV: 8483
Exp: 09-2025
---------------------------
Type: discover
Number: 60019219645956610
CVV: 892
Exp: 05-2023
---------------------------
Type: mc
Number: 5169546719828815
CVV: 678
Exp: 03-2023
---------------------------
Type: visa13
Number: 4929291332548
CVV: 328
Exp: 08-2025
---------------------------
Type: visa16
Number: 4165317319538881
CVV: 106
Exp: 05-2024
---------------------------

Each card is stored in a list of dictionaries.

[
  {
    'cc_type': 'mc', 
    'cc_num': '5538992865196249', 
    'cc_cvv': '617', 
    'cc_exp': '09-2024'
  }, 
  {
    'cc_type': 'mc', 
    'cc_num': '5191748311982485', 
    'cc_cvv': '434', 
    'cc_exp': '11-2023'
    }
]

To access the list directly:

print(amex.card_list)
print(discover.card_list)
print(mc.card_list)
print(visa13.card_list)
print(visa16.card_list)

To print the list to console:

amex.print_card_list()
discover.print_card_list()
mc.print_card_list()
visa13.print_card_list()
visa16.print_card_list()

Handy Info

Card Length Starts With CVV Len CVV Location
Visa 13 13 digits 4xx 3 Back - left of sig
Visa 16 16 digits 4xx 3 Back - left of sig
MasterCard 16 digits 51 or 55 3 Back - left of sig
Amex 15 digits 34 or 37 4 Front - above CC num
Discover 16 digits 6011 3 Back - last 3, after acct num

About CVV Numbers

Other names:

  • CSC - Card Security Code
  • CID - Card Identification Number
  • CVC2 - Card Verification Code
  • CVV2 - Card Verification Value

What is it?

  • An anti-fraud measure used by CC companies worldwide.
  • A 3 or 4 digit number printed on the physical card - and not embossed.
  • Used for Card Not Present (CNP) transactions.
  • Different from the CVV1 that's encoded on track 2 of the magnetic strip - this is used for Card Present Transactions (CPT).

Generated with DES encryption using:

  • Pair of DES keys (CVKs)
  • Primary Account Number (PAN)
  • 4-digit Expiration Date.
  • 3-digit Service Code.
  • Other data

Amex:

  • Does have a 3 digit CID code on back of card.
  • Uses the 4 digit CVV number on front of card for CNP transactions.