The country has announced that it is officially banning Facebook, Twitter, YouTube and all South Korean sites.
The Ministry of Posts and Telecommunications made the announcement this week in a move to highlight its worry over the spread of online information.
Although few North Koreans have internet access, with some able to access a government-sanctioned intranet, foreigners had previously been able to browse with little restriction.
The move will inevitably make it more difficult to spread information about the country to the outside world.