There is a little misconception here, I'll assume accidentally. The primary reason the dark/deep web have that label is because the majority of those sites can only be accessed by knowing the IP address. Most people do not realize there is a HUGE part of the web that is not cataloged by most search engines, last time I checked it was about 87%, imagine an iceberg, what you see on top of the water is the "known" web, whereas what is underwater is the dark web. Your neighbor could easily be running a "dark site" out of their house, you do not need a domain name to make a connection, the vast majority of dark sites are not run out of some abandoned warehouse in the likes of Romania, Bulgaria or the back alleys of NYC. Domain names are for human ease. Not many people know the IP of a specific box to connect to, even if you are a network engineer, even back in my former engineer days, I rarely recalled a specific ip address, usually I made an alias in .bashrc so I wouldn't have to remember it. A VERY high view is this, the DNS(Domain Name System) maps an ip to a human friendly name. This is used on private networks such as your intranet at work and out on the Internet which connects the world. Unless we lose all network and digital communication methods worldwide at the same time, you are not going to get rid of the dark web, plain and simple.