Yup it changed, got this when i just logged in ..
It has come to our attention that you never received any notification regarding our upcoming IP migration in the US.
During this and next week, we will be migrating Teamspeak 3 servers to new IPs and while the DNS name (dal-voice, etc) will stay the same, the port will change.
so yes, the change is legit, they just didnt tell us about it!
The new server address is dal-ts3.fragnet.net:10001 so you just connect to that, or if you use a bookmark, change the address in that to the new one. Password, channels etc etc are all unchanged.