CS2 server status checker

Query a Counter-Strike 2 server the way the community server browser does and see its players, map and response time.

Checked from our server on the public internet. We don't store the addresses you check or any player names. Private and local addresses are refused.

How the Counter-Strike 2 check works

CS2 answers Steam's A2S_INFO query over UDP on the game port itself (27015 unless you start it with a different -port).

Online or not, players and maximum, the current map, the server name and the round-trip time. Bots and player names aren't listed.

The same query works for CS:Source, TF2, Left 4 Dead 2 and Garry's Mod: pick the game in the list.

UDP 27015 (or your -port) is closed to the internet.
The server is still loading a workshop map, or is stuck downloading it.
You entered a different port from the one the server was started with. Check the -port launch option.

More on query ports and what a status check can and can't tell you in the basic mode guide, and everything ServerStats tracks on Counter-Strike 2 servers.

How do I check if my CS2 server is online?

Enter its IP and port. We send the Steam A2S query from outside your network and show what the community browser would see.

What port does a CS2 server use for queries?

The game port itself, 27015 by default. There is no separate query port.

Can I track which maps keep players on my CS2 server?

Yes, with the ServerStats CounterStrikeSharp plugin: minutes played and rounds per map, frame time against the 64-tick budget, and player ping.

Basic mode runs this check continuously for one server, keeps the history and alerts you in Discord when it goes down.