I thought so too but it turns out that, no, its not.
>The first website at CERN - and in the world - was dedicated to the World Wide Web project itself and was hosted on Berners-Lee's NeXT computer. The website described the basic features of the web; how to access other people's documents and how to set up your own server. Although the NeXT machine - the original web server - is still at CERN, sadly the world's first website is no longer online at its original address.
>The first website at CERN - and in the world - was dedicated to the World Wide Web project itself and was hosted on Berners-Lee's NeXT computer. The website described the basic features of the web; how to access other people's documents and how to set up your own server. Although the NeXT machine - the original web server - is still at CERN, sadly the world's first website is no longer online at its original address.