How do you know the ID used by official game?
that website doesn't provide them, and future games can use ID already chosen for homebrew.
All the games I quoted are on the eShop. You just have to look at the order of releases to see that they're being assigned in relative order.
Look at the 0x3XX range, it starts with many launch titles. Kid Icarus' Uprising is 0x300-302, and is known to be
one of the earliest 3DS games in development.
A year or so ago, games were barely crossing 0x1000. Recently they've reached 0x1600.
You also shouldn't trust that just because a game isn't on a random site doesn't mean it's not already assigned, since demo carts, event demos and internal use ROMs have also been assigned unique IDs. (I have seen all of these cases.
) They won't turn up on any site, any time soon.
I'll give you an example.
EU/US Tomodachi Life unique IDs have been on the Savedata Backup blacklist since 2013. This is because they were assigned back then. If they were assigned in 2014, they would've been in the 0x1XXX range already.
For safety, at least the first 0x1700 should be avoided, and probably more.
Promoting the prototype/evaluation range works great, but the way things are now, there are definitely doubles being created, as in my last post.