Common Ports Reference

Network ports and services reference - Complete guide to the most important TCP and UDP ports used in modern networking.

Network ports are numerical identifiers that allow multiple network services to run on a single device.

Port ranges: 0-1023 (well-known), 1024-49151 (registered), 49152-65535 (dynamic)
Protocols: TCP (connection-oriented), UDP (connectionless)
Essential for firewalls, network security, and troubleshooting

Type a port number or service name to filter the tables below.

HTTP: Port 80

HTTPS: Port 443

FTP: Port 21

SFTP: Port 22

SMTP: Port 25

POP3: Port 110

IMAP: Port 143

SMTPS: Port 465

SSH: Port 22

Telnet: Port 23

RDP: Port 3389

VNC: Port 5900

MySQL: Port 3306

PostgreSQL: Port 5432

MSSQL: Port 1433

Oracle: Port 1521

Port	Protocol	Service	Description	Security Notes
20	TCP	FTP Data	File Transfer Protocol data channel	Unencrypted, use SFTP
21	TCP	FTP Control	File Transfer Protocol control channel	Unencrypted, use SFTP
22	TCP	SSH/SFTP	Secure Shell, Secure File Transfer	Encrypted and secure
23	TCP	Telnet	Remote terminal access	Unencrypted, use SSH
25	TCP	SMTP	Simple Mail Transfer Protocol	Often requires authentication
53	TCP/UDP	DNS	Domain Name System	Critical for internet function
67/68	UDP	DHCP	Dynamic Host Configuration Protocol	Server (67), Client (68)
80	TCP	HTTP	HyperText Transfer Protocol	Unencrypted web traffic
110	TCP	POP3	Post Office Protocol v3	Unencrypted email
143	TCP	IMAP	Internet Message Access Protocol	Unencrypted email
443	TCP	HTTPS	HTTP over SSL/TLS	Encrypted web traffic
465	TCP	SMTPS	SMTP over SSL	Encrypted email
993	TCP	IMAPS	IMAP over SSL	Encrypted email
995	TCP	POP3S	POP3 over SSL	Encrypted email
1433	TCP	MSSQL	Microsoft SQL Server	Restrict access, use VPN
3306	TCP	MySQL	MySQL Database	Restrict access, use VPN
3389	TCP	RDP	Remote Desktop Protocol	Change default port
5432	TCP	PostgreSQL	PostgreSQL Database	Restrict access, use VPN