Why does the server have some left hostname?

Question

Network administration

After moving to a VPS from digitalocean.com, ajax requests stopped working. In Google I found that this is something there because of a hostname mismatch.
So. My IP (188.226.175.108) has the hostname allsafe.me (wat?) with some fright.
What's going on? Where did this allsafe.me come from?

Answer 1

As far as I can see allsafe.me is on the PTR record.
As DO says on the DNS settings page
"To update your PTR record please update your Droplet's hostname through the control panel."