alt Hacker NewsCC numbers are also bound to get recycled eventually as cards expire and/or get replaced... even if you block a card, it might have a new owner 6 months or so later.
CC numbers are also bound to get recycled eventually as cards expire and/or get replaced... even if you block a card, it might have a new owner 6 months or so later.
The number space between the first 6 digits (BIN) and the Luhn check digit is 9 digits — that's 1 billion numbers that issuers can give out before a collision happens.