Service Name and Transport Protocol Port Number Registry

0
tcp
Reserved
[Jon_Postel]
[Jon_Postel]

0
udp
Reserved
[Jon_Postel]
[Jon_Postel]

tcpmux
1
tcp
TCP Port Service Multiplexer
[Mark_Lottor]
[Mark_Lottor]

tcpmux
1
udp
TCP Port Service Multiplexer
[Mark_Lottor]
[Mark_Lottor]

compressnet
2
tcp
Management Utility

compressnet
2
udp
Management Utility

compressnet
3
tcp
Compression Process
[Bernie_Volz]
[Bernie_Volz]

compressnet
3
udp
Compression Process
[Bernie_Volz]
[Bernie_Volz]

4
tcp
Unassigned

4
udp
Unassigned

rje
5
tcp
Remote Job Entry
[Jon_Postel]
[Jon_Postel]

rje
5
udp
Remote Job Entry
[Jon_Postel]
[Jon_Postel]

6
tcp
Unassigned

6
udp
Unassigned

echo
7
tcp
Echo
[Jon_Postel]
[Jon_Postel]

echo
7
udp
Echo
[Jon_Postel]
[Jon_Postel]

8
tcp
Unassigned

8
udp
Unassigned

discard
9
tcp
Discard
[Jon_Postel]
[Jon_Postel]

discard
9
udp
Discard
[Jon_Postel]
[Jon_Postel]

discard
9
sctp
Discard
[Randall_Stewart]
[Randall_Stewart]

2022-02-07
[RFC9260]

discard
9
dccp
Discard
[Eddie_Kohler]
[Eddie_Kohler]

[RFC4340]
1145656131

10
tcp
Unassigned

10
udp
Unassigned

systat
11
tcp
Active Users
[Jon_Postel]
[Jon_Postel]

systat
11
udp
Active Users
[Jon_Postel]
[Jon_Postel]

12
tcp
Unassigned

12
udp
Unassigned

daytime
13
tcp
Daytime
[Jon_Postel]
[Jon_Postel]

[RFC867]

daytime
13
udp
Daytime
[Jon_Postel]
[Jon_Postel]

[RFC867]

14
tcp
Unassigned

14
udp
Unassigned

15
tcp
Unassigned [was netstat]

15
udp
Unassigned

16
tcp
Unassigned

16
udp
Unassigned

qotd
17
tcp
Quote of the Day
[Jon_Postel]
[Jon_Postel]

qotd
17
udp
Quote of the Day
[Jon_Postel]
[Jon_Postel]

msp
18
tcp
Message Send Protocol (historic)
[Rina_Nethaniel]
[Rina_Nethaniel]

msp
18
udp
Message Send Protocol (historic)
[Rina_Nethaniel]
[Rina_Nethaniel]

chargen
19
tcp
Character Generator

chargen
19
udp
Character Generator

ftp-data
20
tcp
File Transfer [Default Data]
[Jon_Postel]
[Jon_Postel]

ftp-data
20
udp
File Transfer [Default Data]
[Jon_Postel]
[Jon_Postel]

ftp-data
20
sctp
FTP
[Randall_Stewart]
[Randall_Stewart]

2022-02-07
[RFC9260]

ftp
21
tcp
File Transfer Protocol [Control]
[Jon_Postel]
[Jon_Postel]

[RFC959]

Defined TXT keys: u=<username> p=<password> path=<path>

ftp
21
udp
File Transfer Protocol [Control]
[Jon_Postel]
[Jon_Postel]

[RFC959]

Defined TXT keys: u=<username> p=<password> path=<path>

ftp
21
sctp
FTP
[Randall_Stewart]
[Randall_Stewart]

2022-02-07
[RFC9260]

Defined TXT keys: u=<username> p=<password> path=<path>

ssh
22
tcp
The Secure Shell (SSH) Protocol

[RFC4251]

Defined TXT keys: u=<username> p=<password>

ssh
22
udp
The Secure Shell (SSH) Protocol

[RFC4251]

Defined TXT keys: u=<username> p=<password>

ssh
22
sctp
SSH
[Randall_Stewart]
[Randall_Stewart]

2022-02-07
[RFC9260]

Defined TXT keys: u=<username> p=<password>

telnet
23
tcp
Telnet
[Jon_Postel]
[Jon_Postel]

[RFC854]

Defined TXT keys: u=<username> p=<password>

telnet
23
udp
Telnet
[Jon_Postel]
[Jon_Postel]

[RFC854]

Defined TXT keys: u=<username> p=<password>

24
tcp
any private mail system
[Rick_Adams]
[Rick_Adams]

24
udp
any private mail system
[Rick_Adams]
[Rick_Adams]

smtp
25
tcp
Simple Mail Transfer
[IESG]
[IETF_Chair]

2017-06-05
[RFC5321]

smtp
25
udp
Simple Mail Transfer
[IESG]
[IETF_Chair]

2017-06-05
[RFC5321]

26
tcp
Unassigned

26
udp
Unassigned

nsw-fe
27
tcp
NSW User System FE
[Robert_Thomas]
[Robert_Thomas]

nsw-fe
27
udp
NSW User System FE
[Robert_Thomas]
[Robert_Thomas]

28
tcp
Unassigned

28
udp
Unassigned

msg-icp
29
tcp
MSG ICP
[Robert_Thomas]
[Robert_Thomas]

msg-icp
29
udp
MSG ICP
[Robert_Thomas]
[Robert_Thomas]

30
tcp
Unassigned

30
udp
Unassigned

msg-auth
31
tcp
MSG Authentication
[Robert_Thomas]
[Robert_Thomas]

msg-auth
31
udp
MSG Authentication
[Robert_Thomas]
[Robert_Thomas]

32
tcp
Unassigned

32
udp
Unassigned

dsp
33
tcp
Display Support Protocol
[Ed_Cain]
[Ed_Cain]

dsp
33
udp
Display Support Protocol
[Ed_Cain]
[Ed_Cain]

34
tcp
Unassigned

34
udp
Unassigned

35
tcp
any private printer server
[Jon_Postel]
[Jon_Postel]

35
udp
any private printer server
[Jon_Postel]
[Jon_Postel]

36
tcp
Unassigned

36
udp
Unassigned

time
37
tcp
Time
[Jon_Postel]
[Jon_Postel]

time
37
udp
Time
[Jon_Postel]
[Jon_Postel]

rap
38
tcp
Route Access Protocol
[Robert_Ullmann]
[Robert_Ullmann]

rap
38
udp
Route Access Protocol
[Robert_Ullmann]
[Robert_Ullmann]

rlp
39
tcp
Resource Location Protocol
[Mike_Accetta]
[Mike_Accetta]

rlp
39
udp
Resource Location Protocol
[Mike_Accetta]
[Mike_Accetta]

40
tcp
Unassigned

40
udp
Unassigned

graphics
41
tcp
Graphics

graphics
41
udp
Graphics

name
42
tcp
Host Name Server

name
42
udp
Host Name Server

nameserver
42
tcp
Host Name Server

nameserver
42
udp
Host Name Server

nicname
43
tcp
Who Is

nicname
43
udp
Who Is

mpm-flags
44
tcp
MPM FLAGS Protocol

mpm-flags
44
udp
MPM FLAGS Protocol

mpm
45
tcp
Message Processing Module [recv]

mpm
45
udp
Message Processing Module [recv]

mpm-snd
46
tcp
MPM [default send]
[Jon_Postel]
[Jon_Postel]