Port Lookup

Port
Protocol
Description
Service
Assignee
20
TCP
File Transfer [Default Data]
ftp-data
[Jon_Postel]
20
UDP
File Transfer [Default Data]
ftp-data
[Jon_Postel]
20
SCTP
FTP
ftp-data
[Randall_Stewart]
21
TCP
File Transfer Protocol [Control]
ftp
[Jon_Postel]
21
UDP
File Transfer Protocol [Control]
ftp
[Jon_Postel]
21
SCTP
FTP
ftp
[Randall_Stewart]
22
TCP
The Secure Shell (SSH) Protocol
ssh
22
UDP
The Secure Shell (SSH) Protocol
ssh
22
SCTP
SSH
ssh
[Randall_Stewart]
23
TCP
Telnet
telnet
[Jon_Postel]
23
UDP
Telnet
telnet
[Jon_Postel]
24
TCP
any private mail system
[Rick_Adams]
24
UDP
any private mail system
[Rick_Adams]
25
TCP
Simple Mail Transfer
smtp
[IESG]
25
UDP
Simple Mail Transfer
smtp
[IESG]
26
TCP
Unassigned
26
UDP
Unassigned
27
TCP
NSW User System FE
nsw-fe
[Robert_Thomas]
27
UDP
NSW User System FE
nsw-fe
[Robert_Thomas]
28
TCP
Unassigned