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Port 90512 services

2 entries are registered on port 9051. 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.

entries
2

services registered on this number

transport
tcp

1 transport in use

in transit
0/2

entries encrypted on the wire

worst risk
5/10

1 of 2 iana-registered

Services on this port

ranked by lookups
portservicerisk
:9051Tor Controlcaution
:9051Fusion-io Central Manager Servicesafe

01Tor Controltcp · unofficial · risk 5/10

Tor (The Onion Router) is a volunteer-operated overlay network designed to enable anonymous communication over the Internet. It routes traffic through multiple relays to obscure the user's location and usage from surveillance or network traffic analysis, promoting privacy and free access. Port 9051 is primarily used as the Control Port for interacting programmatically with the Tor daemon, allowing software to script or query Tor's status.

port 9051 as Tor Control →
filed underSecurityNetwork Services

Which one is on your host

ask the machine, not the registry

The registry says what 9051 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.

linux
ss -ltnp | grep ':9051\b'
macos
lsof -nP -iTCP:9051 -sTCP:LISTEN
windows
netstat -ano | findstr :9051

On 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 9051 — 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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