Well-Known Port Numbers

Port

Name

Description

1
TCPMUX
TCP Port Service Multiplexer
5
RJE
Remote Job Entry
7
ECHO
Echo
9
DISCARD
Discard
11
USERS
Active Users
13
DAYTIME
Daytime
17
Quote
Quote of the Day
19
CHARGEN
Character Generator
20
FTP-DATA
File Transfer (Data Channel)
21
FTP
File Transfer (Control Channel)
23
TELNET
TELNET
25
SMTP
Simple Mail Transfer
27
NSW-FE
NSW User System FE
29
MSG-ICP
MSG-ICP
31
MSG-AUTH
MSG Authentication
33
DSP
Display Support Protocol
35

Private Printer Server
37
TIME
Time
39
RLP
Resource Location Protocol
41
GRAPHICS
Graphics
42
NAMESERVER
Host Name Server
43
NICNAME
Who Is
49
LOGIN
Login Host Protocol
53
DOMAIN
Domain Name Server
67
BOOTPS
Bootstrap Protocol Server
68
BOOTPC
Bootstrap Protocol Client
69
TFTP
Trivial File Transfer Protocol
79
FINGER
Finger
101
HOSTNAMENIC
Host Name Server
102
ISO-TSAP
ISO TSAP
103
X400
X.400
104
X400SND
X.400 SND
105
CSNET-NSCSNET
Mailbox Name Server
109
POP2
Post Office Protocol v2
110
POP3
Post Office Protocol v3
111
SUNRPC
SUN RPC Portmap
137
NETBIOS-NS
NETBIOS Name Service
138
NETBIOS-DGMNET
BIOS Datagram Service
139
NETBIOS-SSNNET
BIOS Session Service
146
ISO-TP0
ISO TP0
147
ISO-IP
ISO IP
150
SQL-NET
SQL-NET
153
SGMP
SGMP
156
SQLSRV
SQL Service
160
SGMP-TRAP5
SGMP TRAPS
161
SNMP
SNMP
162
SNMPTRAP
SNMPTRAP
163
CMIP-MANAGE
CMIP/TCP Manager
164
CMIP-AGENT
CMIP/TCP Agent
165
XNS-COURIER
Xerox Network
179
BGP
Border Gateway Protocol

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Maintained by Mohan Atreya , Last update April 8, 1999

First created on November 10, 1998