Port 991

Modified by:

Port 991 is used for Secure Telnet Protocol over TLS/SSL, which provides encrypted communication between the telnet client and server. It is primarily used for remote administration and maintenance of network devices and servers.

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.

Official

Port
Protocol (TCP/UDP)
Title
Description
Port Type
Port 991
tcp
nas
Netnews Administration System
WELL KNOWN PORT
Port 991
udp
nas
Netnews Administration System
WELL KNOWN PORT

UnOfficial

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

Port Protocol (TCP/UDP) Description
TCP UDP Ports
Other ports
Port 1263
Ports those registered with IANA are shown as official ports. The same port number
Ports 39200 – 39300
Port 39200- Port 39300 Port 39300- Port 39400 Port 39400- Port 39500 Port 39500-
Port 6679
Port 6679 is commonly used for IRC (Internet Relay Chat) over SSL (Secure Sockets
Port 2292
Ports those registered with IANA are shown as official ports. The same port number
Port 9950
Ports those registered with IANA are shown as official ports. The same port number
Port 3088
Port 3088 is not associated with any specific protocol or service. It is an
Port 5407
Ports those registered with IANA are shown as official ports. The same port number
Ports 40300 – 40400
Port 40300- Port 40400 Port 40400- Port 40500 Port 40500- Port 40600 Port 40600-
Port 8991
Ports those registered with IANA are shown as official ports. The same port number
Port 1184
Port 1184 is primarily used for communication between devices using the Mobile Synchronization Protocol
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