2 entries are registered on port 1725. 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 |
|---|---|---|---|---|---|
| :1725 | Valve Steam | UDP | Gaming | caution | 7.3k |
| :1725 | iDEN RALP | TCPUDP | — | safe | 0 |
Valve Steam Client uses port 1725 to facilitate communication for various gaming-related functions including server discovery, matchmaking, downloads, and updates. Primarily leveraging UDP, this port helps support low-latency, real-time data exchanges to ensure smooth gameplay and fast connectivity between Steam clients and game servers.
port 1725 as Valve Steam →An IANA-assigned TCP/UDP service for iDEN RALP traffic with no documented public deployment.
port 1725 as iDEN RALP →The registry says what 1725 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 ':1725\b'lsof -nP -iTCP:1725 -sTCP:LISTENnetstat -ano | findstr :1725On 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 1725 — 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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