Yes, which aids the spamming. The first 6 digits of a card number is called the BIN code. That leaves just 9 digits that have to be spammed. The fact that BIN

Yes, which aids the spamming. The first 6 digits of a card number is called the BIN code. That leaves just 9 digits that have to be spammed. The fact that BIN lists are publicly available is reducing the space significantly.