Belkin F1DP116SEA User Manual
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Appendix C: Well-Known TCP/UDP Port Numbers
Port numbers are divided into three ranges: Well-Known Ports, Registered Ports, and
Dynamic and/or Private Ports. Well-Known Ports are those from 0 through 1023. Registered
Ports are those from 1024 through 49151. Dynamic and/or Private Ports are those from
49152 through 65535.
Well-Known Ports are assigned by IANA, and on most systems, can only be used by system
processes or by programs executed by privileged users. The table below shows some of the
well-known port numbers. For more details, please visit the IANA website: http://www.iana.
org/assignments/port-numbers.
Port Number
Protocol
TCP/UDP
21
FTP (File Transfer Protocol)
TCP
22
SSH (Secure Shell)
TCP
23
Telnet
TCP
25
SMTP (Simple Mail Transfer
Protocol)
TCP
37
Time
TCP, UDP
39
RLP (Resource Location
Protocol)
UDP
49
TACACS, TACACS+
UDP
53
DNS
UDP
67
BOOTP server
UDP
68
BOOTP client
UDP
69
TFTP
UDP
70
Gopher
TCP
79
Finger
TCP
80
HTTP
TCP
110
POP3
TCP
119
NNTP (Network News
Transfer Protocol)
TCP
161/162
SNMP
UDP
443
HTTPS
TCP