Random question (squad numbers)

What's the highest squad number a player can have?

Basically can you have a squad number of 100+

My nephew asked and I don't know the answer lol

Doubt it,thought you could only go to souble figures ie 99 but i could be wrong

I could have sworn that I remember seeing someone with three digits but I might be wrong. There have also been strange numbers like 8+1 or 5+5

I remember Ivan Zamorano having 1+8

Just wondered about the rules, makes sense to be only 2 digits lol