What is Common Ports?
Ports identify services within a single machine: 80 for HTTP, 443 for HTTPS, 22 for SSH, 5432 for PostgreSQL, and so on. Knowing the common ports speeds up configuring servers, firewalls and deployments.
This reference gathers the most common TCP/UDP ports with the service running on each, so you don't have to look them up when opening a firewall, connecting to a database or diagnosing a network issue.
The ones worth memorizing: 80 (HTTP) and 443 (HTTPS) for the web, 22 (SSH), 53 (DNS), 25/465/587 (SMTP mail) and databases like 3306 (MySQL), 5432 (PostgreSQL) or 6379 (Redis). Ports below 1024 are "privileged" and need administrator permissions to listen on.
Frequently asked questions
Which port does HTTPS use?
Port 443 (TCP). Unencrypted HTTP uses port 80.
Which port does SSH use?
Port 22 (TCP), the same as SFTP.
What is the difference between TCP and UDP?
TCP is connection-oriented and reliable (web, mail, databases); UDP does not confirm delivery but is faster (DNS, NTP, streaming).
Is it free?
Yes, all NewKit tools are completely free.
Is my data sent to a server?
No. Processing happens 100% in your browser, so it is safe even for sensitive data.