Heh. I own https://9007199254740991.com/

It’s the max safe integer in double precision floating point format.

So... you reinvented ip addresses.

Can you recommend a good site to find/check these prices? No problem if not, I'm utterly clueless and entirely curious lol.

my domains were also dirty cheap. they jacked up the prices afterwards because they can

Those are class 1.111B domains. I actually buy them a little cheaper, but have to do it one year at a time. It's only 6-9 digits though, not any string of digits