Port Checker
Check common service ports
Source Input
Processed Output
What is the Port Checker?
Every network service listens on a numbered port. This reference tool identifies what runs on any port (official IANA assignment, protocol, and common usage) and flags well-known security concerns — useful when reading firewall logs, nmap output, or hardening a server's exposed surface.
Frequently Asked Questions (FAQ)
Q: What are the most commonly scanned ports?
22 (SSH), 80 (HTTP), 443 (HTTPS), 3389 (RDP), and 3306 (MySQL) attract the most scanning traffic.
How to Use the Port Checker
- 1Paste your input into the editor above — or start from the preloaded example.
- 2Adjust any options, then click Run to process instantly in your browser.
- 3Review the output panel, then copy, download, or save it as a reusable snippet.