“A” records can be:
- simple subdomain: “subdomain”, points to IP, TTL usually automatic, traffic not through Cloudflare
- sub-subdomain wildcard (all sub-subdomains go to the one IP): “*.subdomain” + other values the same
- separate sub-subdomains going to the different IPs: “subsubdomain.subdomain”, IP,… etc.
To see target IP of a domain, subdomain etc. use “dig your.address.xxx”. Command “dig” is part of the package “dnsutils”.