Open Port Checker

Check if a port is open on any server or IP address

Common Ports (click to check):
21 FTP 22 SSH 23 Telnet 25 SMTP 53 DNS 80 HTTP 110 POP3 143 IMAP 443 HTTPS 445 SMB 993 IMAPS 995 POP3S 1433 MSSQL 3306 MySQL 3389 RDP 5432 PostgreSQL 5900 VNC 6379 Redis 8080 HTTP-Alt 8443 HTTPS-Alt 27017 MongoDB
Scanning... 0/0

Enter a host/IP and port number above, then click "Check" to test if the port is open.

# Host IP Port Service Status Response Time

What is Open Port Checker?

Open Port Checker is a free online tool that allows you to check whether a specific port is open or closed on a remote server or IP address. This is useful for verifying firewall rules, checking if services are running, testing port forwarding configurations, and troubleshooting network connectivity issues.

How to use?

1. Enter the server hostname (e.g. google.com) or IP address (e.g. 8.8.8.8).
2. Enter the port number you want to check (e.g. 80 for HTTP, 443 for HTTPS).
3. Click "Check" to test a single port, or "Scan All Common Ports" to test all popular ports at once.
4. You can also click on any common port tag to quickly set and check that port.