Official List

Port 9999

Ports those registered with IANA are shown as official ports. The same port number may be unofficialy used by various services or applications. The official usage are listed separately below its usage may change from time to time.


Port Protocol (TCP/UDP) Title Description Port Type
Port 9999 tcp distinct distinct REGISTERED PORT
Port 9999 udp distinct distinct REGISTERED PORT


Unofficialy or sometimes with conflict, the same port may be used by different applications.

Port Protocol (TCP/UDP) Description
Port 9999 Hydranode—edonkey2000 TELNET control
Port 9999 Lantronix UDS-10/UDS100 RS-485 to Ethernet Converter TELNET control
Port 9999 Urchin Web Analytics