The present invention relates to a method of providing a number URL service. One embodiment of the present invention can provide a method of providing a number URL service using a number URL as a primary domain, the method being capable of displaying all websites of a population of six billion on a single screen by expressing each of the websites by a five-digit number URL, allowing a user to use six billion websites by a single login, without re-login, and allowing the intuitional creation and management of each website. The problem-solving means of the present invention allows the maintenance of a website without paying maintenance fees by using a primary domain, allows people all around the world to switch between six billion or more websites on a single screen by a single login, without re-login, and also allows the integrated use of points.