2 entries are registered on port 3979. 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 |
|---|---|---|---|---|---|
| :3979 | OpenTTD | TCPUDP | Gaming | caution | 4.4k |
| :3979 | Smith Micro Wide Area Network Service | TCPUDP | Network Services | safe | 0 |
OpenTTD is a popular open-source simulation game that emulates and expands upon the classic Transport Tycoon Deluxe. It uses this port primarily to facilitate multiplayer connections, enabling players to collaboratively or competitively build transportation networks over the internet or local networks.
port 3979 as OpenTTD →Port 3979 is assigned to the Smith Micro Wide Area Network Service.
port 3979 as Smith Micro Wide Area Network Service →The registry says what 3979 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 ':3979\b'lsof -nP -iTCP:3979 -sTCP:LISTENnetstat -ano | findstr :3979On 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 3979 — 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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