There are still smaller blocks, nothing that could fulfill the needs of Comcast or Amazon Web Services, though.
It's also important to note that ISPs have large troves of unused IPv4 addresses, so the big names won't run out any time soon.
I wonder what the return on investment would be for a whole block purchased in the 90's ... https://xkcd.com/195/
There are still smaller blocks, nothing that could fulfill the needs of Comcast or Amazon Web Services, though.
It's also important to note that ISPs have large troves of unused IPv4 addresses, so the big names won't run out any time soon.
I wonder what the return on investment would be for a whole block purchased in the 90's ... https://xkcd.com/195/