Each of those characters (aside from domain) could be any of 66 unique ones:

   Uppercase letters: A through Z (26 characters)

   Lowercase letters: a through z (26 characters)

   Digits: 0 through 9 (10 characters)

   Special: - . _ ~ (4 characters)

Unless you have some kind of mapping to encode different states with different character blocks your possibilities are much more limited. Like storing product ids or EAN plus the number of items. Just hope the user isn’t on a shopping spree