Notoriously secret, no one had ever really known the structure of North Korea's tightly-controlled internet, which is inaccessible to people outside the country - until now.

An official in North Korea somehow accidentally temporarily enabled anyone to access the country's top level domain name server (DNS) data on Monday, which details the names of different websites on the country's domain .kp.

Programmers on GitHub accessed the data and found that there are just 28 sites on the entire country's internet, while Reddit users compiled a list of the sites on .kp, and what each one would be used for.

The sites that all residents of North Korea can access includes Rodong.rep.kp, the country's official news service website; cooks.org.kp, a culinary site with a selection of recipes; airkoryo.com.kp, which is the site for the country's airline, Air Koryo.

Residents can also access the site of an insurance company, a charity for the elderly, and a film festival website.

There is also a website, friend.com.kp, which may be an attempt at creating a North Korean version of Facebook or other social media sites.

Most of the domains can be visited and viewed from outside North Korea, but some still remain a mystery.

Here is the full list of domains which can be accessed in the country: