Frequently used Port Numbers

You are in a hurry, and want to refer the common port numbers — you can’t go through the whole list of port numbers to find the useful ports. Here I’ve given some frequently used port numbers for a quick reference:

20

File Transfer – Data port

21

File Transfer – Command port

22

Secure Shell

23

Telnet

25

Simple Mail Transfer Protocol

43

WHOIS Domain Lookup

53

Domain Name System

67

DHCP Server

68

DHCP Client

80

HTTP

88

Kerberos authentication

110

POP version 3

118

SQL Services

123

Network Time Protocol

135

RPC – Microsoft Endpoint Mapper

137

NetBIOS Name Service

138

NetBIOS Datagram Service

139

NetBIOS Session Service

143

Internet Message Access Protocol

161

Simple Network Management Protocol

162

SNMP Trap

179

Border Gateway Protocol

194

Internet Relay Chat

201

AppleTalk Routing Maintenance

389

Lightweight Directory Access Protocol

443

Secure Socket Layer — HTTPS

500

Internet Security Association and Key Management Protocol

514

Remote Shell

520

Routing Information Protocol

860

Internet Small Computer System Interface — iSCSI

989

FTP over TLS/SSL – data port

990

FTP over TLS/SSL – command port

992

Telnet over TLS/SSL

993

IMAP over TLS/SSL

995

POP3 over TLS/SSL

1433

Ms SQL

2082

cPanel

3128

Squid Proxy

3306

MySQL

8080

HTTP (Alternate Port)

 

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