How deep in the domain hierarchy you are doesn't matter from a network layer: a bare tld (yes this exists), a normal domain, a subdomain, a sub-subdomain, etc c

How deep in the domain hierarchy you are doesn't matter from a network layer: a bare tld (yes this exists), a normal domain, a subdomain, a sub-subdomain, etc can all be assigned different IPs and go different places. You can issue a GET against / for any IP you want (like we see in the logs OP posted). The only time this would actually matter is if a host at an address is serving content for multiple hostnames and depends on the Host header to figure out which one to serve -- but even those will almost always have a default.