The North Korea has only 28 registered domains for its top-level domain,.kp. An apparent error in the configuration of a North Korean nameserver has revealed a list of all the domains for the country. North Korea is known for its limited exposure on the Internet, it fears cyber attacks from foreign Governments against its infrastructure. Some of the sites in the list are not reachable, experts speculated that they were flooded with the traffic of curious netizens and went down because of the traffic.”]
Source: https://securityaffairs.co/wordpress/51475/hacking/north-korea-internet.html