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Port 10011 (TeamSpeak ServerQuery)

TeamSpeak 3 ServerQuery admin interface (raw).

Registered (user) port, 1024-49151 TCP Voice, video and chat Localhost or LAN only

What port 10011 is used for

TeamSpeak 3 ServerQuery admin interface (raw).

Security: should port 10011 be open?

Localhost or LAN only. Restrict to localhost; ServerQuery can fully administer the server.

IANA assignment

Port 10011 is in the registered range and has no IANA assignment. The usage above is unofficial but widespread.

Check what is listening on port 10011

Linux: is anything listening on TCP 10011?
sudo ss -tlnp 'sport = :10011'
Linux / macOS: which process owns the port
sudo lsof -nP -i :10011
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':10011 '
Windows (Command Prompt)
netstat -ano | findstr :10011
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 10011 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 10011
From Windows
Test-NetConnection HOST -Port 10011

Block port 10011 in the firewall

ufw
sudo ufw deny 10011/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 10011 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 10011 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 10011' -Direction Inbound -Protocol TCP -LocalPort 10011 -Action Block

Related ports

9987TeamSpeak 3 voice30033TeamSpeak file transfer10009swdtp-sv10010rxapi10020abb-hw10023cefd-vmp10050Zabbix agent

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.