Ben Cox writes in his blog about visualizing IPv4 address space use by mapping the whole IPv4 Internet with Hilbert curves. While the IPv4 address space is quite large it is still small enough to be able to send a packet to each and every IP address. He goes a little into the background of the maths involved and then makes a comparison to the IPv4 address space back in 2012 using data from the Carna botnet.
[See, also: xkcd's MAP of the INTERNET, the IPv4 space, 2006. --martyb]
Earlier on SN: Vint Cerf's Dream Do-Over: 2 Ways He'd Make the Internet Different
(Score: 2) by MichaelDavidCrawford on Monday April 23 2018, @10:58PM
$ sudo ping -f -c 1000 nsa.gov
It answered at first but after a hundred or so responses I got "host unreachable" messages.
Now they don't answer pings at all.
Yes I Have No Bananas. [gofundme.com]