When attempting to go to cloudfront.net, my browser reports a DNS error. However, when doing a whois on the domain, it reports that the domain has been registered since 2008.
I'm wondering how can the domain be registered but not work?
A domain name can be used for other things than web browsing. This domain name has NS records but
www.cloudfront.net has no A record, hence the error with your browser. If you search online you will see that this domain name is used in hostnames such as
It is Amazon CDN offering, see https://aws.amazon.com/cloudfront/details/