2 entries are registered on port 999. It is a well-known port (0–1023) — assignments here are IANA's, and a service found on one is usually the service that was assigned it.
services registered on this number
2 transports in use
entries encrypted on the wire
1 of 2 iana-registered
ScimoreDB is a high-performance, embeddable database engine designed to provide a scalable SQL database solution primarily for Windows systems. It supports a wide range of SQL features, enabling developers to integrate database capabilities directly into their applications with minimal overhead.
port 999 as ScimoreDB →UDP port 999 is assigned to the Applix ac service.
port 999 as Applix ac →The registry says what 999 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 ':999\b'lsof -nP -iTCP:999 -sTCP:LISTENnetstat -ano | findstr :999On 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 999 — 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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