2 entries are registered on port 9875. It is a registered port (1024–49151) — IANA records an assignee, but nothing stops other software from listening here, which is why the number carries more than one entry.
services registered on this number
2 transports in use
entries encrypted on the wire
1 of 2 iana-registered
| port | service | proto | category | risk | views |
|---|---|---|---|---|---|
| :9875 | Club Penguin | TCP | Gaming | caution | 7.3k |
| :9875 | Session Announcement Protocol v1 | TCPUDP | Streaming | safe | 0 |
Port 9875 is associated with Club Penguin, a Disney online multiplayer game aimed at children. It facilitates the game's network communications such as messaging, world state synchronization, and gameplay interactivity, enabling players to connect to and interact within the virtual world.
port 9875 as Club Penguin →Distributes multicast session announcements, commonly carrying SDP descriptions for streaming media.
port 9875 as Session Announcement Protocol v1 →The registry says what 9875 is registered to. What is listening on it right now is decided by the host, and only the host can be asked. Each of these prints the process behind the socket.
ss -ltnp | grep ':9875\b'lsof -nP -iTCP:9875 -sTCP:LISTENnetstat -ano | findstr :9875On Linux and Windows the process name comes back with the socket; on macOS lsof needs sudo to name a process that isn't yours. Match what it prints against the 2 entries above.
A port number is not a service. Anything may listen on 9875 — what you actually met is decided by the host, not the registry. If a service is missing here, it belongs in the registry.
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