Question: Same Domain, Diferent IPs ?

Hey there, I was with nothing else to do and I was pinging random domains and in one I've got something like this:

I ping the main domain and got an IP, pinged one of it subdomains and got an IP on the same address range but after that, pinging it "sub subdomain" I got a different IP pointing to another place that doesn't seems to relate (at first inspection). And pinging again the same "sub subdomain" I got another different address (note to red rectangules).

Questions:

1 - The subdomain tagstat.com works as a router or a switch layer 3 OR something else?

2 - Returning a different address range (and name), can this meen that its pointing/delivering to another network or subnetwork?

3 - Returning different IP addresses from the same "sub subdomain", what does this meen? Same machine with different ports or two machine for the same name? (or even something else?)

Ty for your attention,

Cheers