As recorded at collection: dnshe permanent free domains, up to 9 per account

dnshe is a domain registration service that can raise the domain limit per account to up to 9. Six accounts can authenticate one another to secure a dozen or so permanently free domains. de5.net, cc.cd, and ccwu.cc can be connected to Cloudflare (a website address management service).

First, prepare 6 email addresses. If you create 2 alias addresses for each of 2 QQ email accounts, you will have 6 addresses including the original ones. You will need to check whether Google email aliases can also be used. Create a separate GitHub account for each email, then sign in to dnshe (https://dnshe.com/) with a GitHub account, or sign in with email and then authenticate through GitHub. Increase the domain limit to a maximum of 9 in the Rewards Center, then register domains. Turn on the permanent upgrade feature in the Features Center, then have the 6 accounts authenticate one another. Once a domain has received 5 authentications, it becomes a permanent domain.

The method of creating unlimited GitHub accounts with Cloudflare domain email addresses used to work, but the accounts were blocked on the day the author checked. The domains you receive are independent second-level domains, not top-level domains. The author says de5.net looks more plausible, and that if you plan to use a domain for real, it is better to buy a separate six-digit xyz domain. They can be used without issue to get Cloudflare benefits or create domain email addresses.