How to create a subdomain on a server with a dedicated ip?

Question

Domain name market

In continuation of the question . There is a server, a dedicated IP, a domain that leads to the server. How to create a subdomain?

Answer 1

Add an A record like * for your domain, and all requests to your domain and all 3rd and higher level domains will refer to your IP.
Next, on the server, set up virtual hosts in which you register level 3 domains.
PS: by default, leave the main domain.
or
*.site.ru A IP

Answer 2

Why didn't you like the answer? You need to go to the place to whom you delegated the management of your domain, and register the subdomain and its IP there.