3 entries are registered on port 8501. 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
2 of 3 iana-registered
| port | service | proto | category | risk | views |
|---|---|---|---|---|---|
| :8501 | DukesterX | TCP | File Transfer | caution | 5.0k |
| :8501 | CYTEL Message Transfer Audio and Video | UDP | Media | safe | 0 |
| :8501 | Streamlit | TCP | Web Services | caution | 0 |
DukesterX is a decentralized, peer-to-peer chat and file sharing platform. It focuses on facilitating private communication and collaboration by directly connecting clients without centralized servers. Typically running on port 8501, DukesterX clients establish TCP connections to exchange data and messages in a secure, decentralized network.
port 8501 as DukesterX →UDP port assigned to CYTEL Message Transfer Audio and Video; no common public deployment is documented.
port 8501 as CYTEL Message Transfer Audio and Video →Usually the default HTTP port for Streamlit apps; IANA assigns it to CYTEL Message Transfer Management.
port 8501 as Streamlit →The registry says what 8501 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 ':8501\b'lsof -nP -iTCP:8501 -sTCP:LISTENnetstat -ano | findstr :8501On 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 3 entries above.
A port number is not a service. Anything may listen on 8501 — 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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