Some Port Numbers That Are Good To Know

In this article you will find some commonly used and good to know ports.

0 – 1023 – Well Known Port Numbers

1024 – 49151 – Registered Port numbers

49152 – 65535 – Dynamically Assigned Port Numbers


Protocol Port number
File Transfer Protocol (FTP) Data Transfer 20
File Transfer Protocol (FTP) Command Control 21
Secure File Transfer Protocol (SFTP) 22
Secure Shell (SSH)  22
Telnet – Remote login service, unencrypted text message  23
Simple Mail Transfer Protocol (SMTP)   25
Domain Name System service (DNS)  53
Dynamic Host Configuration Protocol 67, 68
Trivial File Transfer Protocol (TFTP) 69
Hypertext Transfer Protocol (HTTP)   80
Post Office Protocol (POP3)    110
Network News Transfer Protocol (NNTP)
Network Time Protocol (NTP) 123
Internet Message Access Protocol (IMAP) 143
Simple Network Management Protocol (SNMP)
161, 162
Lightweight Directory Access Protocol (LDAP) 389
HTTP Secure (HTTPS) HTTP over TLS/SSL 443
Real Time Sreaming Protocol (RTSP) 554
Simple Mail Transfer Protocol (SMTP) over TLS/SSL
Internet Message Access Protocol (IMAP) over TLS/SSL
Post Office Protocol (POP3) over TLS/SSL 995
Remote Desktop Protocol (RDP)


More information