Solved Can't Resolve Hostname Server Error

Well, this isssue is how it sounds.

It's mostly to do with my domain, and partly to do with my server(s) (BungeeCord).

I figured I'd go for help here, since they are Bukkit servers.

My players and I were able to connect just fine to my domain, then all of a sudden, it became "Can't Resolve Hostname". I tried to make it so it was play.<domain> for the sake of testing, and it worked fine.

What is wrong here? Should I close and reopen ports? Should I restart all the servers? Should I do something with Bungee?

Please let me know what I should do, guys. It would be very appreciated.

Well, it seems that just waiting it out worked for me. When all else fails, wait a little while.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.