Vortex's #05 Rush server is one of the few active BC2 servers and the only one I really play on lately, but for some reason it hasn't shown up in GameTracker's list for months..

I think its IP is 89.163.144.174:19565. When I try to add it manually myself, GameTracker says that IP:port is already in the database. However, when you search the full BC2 server page by IP address, it doesn't show an entry for that IP:port. Could one of the mods here please check the database for that IP:port and see if we can get this server listed once again? Thanks!

As BC2 servers require a query port to be entered, it is not possible to be certain of entering the correct query port without knowing it in advance.
Only the server owner would know this.

I have checked the query ports for all the servers listed for 89.163.144.174.
Unfortunately there is no obvious answer as to the query port for a server at 89.163.144.174:19565.

You may wish to try contacting the probable server owner at; https://www.gametracker.com/dicemodding/ to inquire as to the server status.