2 entries are registered on port 3899. 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 |
|---|---|---|---|---|---|
| :3899 | Remote Administrator | TCP | Remote Access | caution | 20.6k |
| :3899 | ITV Port | TCPUDP | — | safe | 0 |
Port 3899 is primarily associated with Remote Administrator (Radmin), a remote desktop software suite by Famatech. It provides tools for remote management, technical support, and system administration, allowing administrators to securely control and access remote computers over a network or the internet.
port 3899 as Remote Administrator →ITV Port, an IANA-assigned service on TCP and UDP port 3899.
port 3899 as ITV Port →The registry says what 3899 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 ':3899\b'lsof -nP -iTCP:3899 -sTCP:LISTENnetstat -ano | findstr :3899On 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 3899 — 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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