Registered · Cross-platform

5000 UPnP / Flask / Docker Registry

TCP Unofficial
UDP Unofficial
SCTP —
DCCP —

What it is

Heavily overloaded: UPnP, ASP.NET Core/Flask dev servers, Docker Registry, Synology, AirPlay.

When / why

Confirm which service before opening — this port means different things on different hosts.

Protocol status detail

TransportStatusMeaning
TCP Unofficial Not assigned by IANA, but standardized, specified, or widely used on this port.
UDP Unofficial Not assigned by IANA, but standardized, specified, or widely used on this port.
SCTP — Not applicable for this transport.
DCCP — Not applicable for this transport.
« 4949 Munin 5001 iperf / Synology (TLS) »

Port range

Registered (1024–49151). Assigned by IANA on request; usable without elevated privileges on most systems.

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