🚪 Open Port Checker
Check if specific ports are open or closed on any IP address or hostname. Scan common service ports for accessibility.
What is Port Scanning?
Port scanning is a technique used to identify open network ports on a host. Each port number corresponds to a specific service or protocol. By checking which ports are open, you can determine what services are running on a server and identify potential security vulnerabilities.
Common Ports
| Port | Service |
|---|---|
| 21 | FTP |
| 22 | SSH |
| 23 | Telnet |
| 25 | SMTP |
| 53 | DNS |
| 80 | HTTP |
| 110 | POP3 |
| 143 | IMAP |
| 443 | HTTPS |
| 465 | SMTPS |
| 587 | Submission |
| 993 | IMAPS |
| 995 | POP3S |
| 3306 | MySQL |
| 3389 | RDP |
| 5432 | PostgreSQL |
| 8080 | HTTP Alt |
| 8443 | HTTPS Alt |