2 entries are registered on port 3101. 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 |
|---|---|---|---|---|---|
| :3101 | BlackBerry BES Cloud Comm | TCP | Cloud | caution | 7.1k |
| :3101 | HP PolicyXpert PIB Server | TCPUDP | — | safe | 0 |
This port is primarily used by BlackBerry Enterprise Server (BES) to facilitate communication between on-premise infrastructure and BlackBerry cloud services. It enables synchronization, management, and secure messaging functionalities for enterprise BlackBerry devices by acting as a point for data exchange and command relay.
port 3101 as BlackBerry BES Cloud Comm →Port 3101 is assigned to the HP PolicyXpert PIB Server.
port 3101 as HP PolicyXpert PIB Server →The registry says what 3101 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 ':3101\b'lsof -nP -iTCP:3101 -sTCP:LISTENnetstat -ano | findstr :3101On 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 3101 — 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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