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Port Checker
Instantly test any TCP port on a domain or IP address to check its connection status.
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Processed Locally
Port Checker
Check whether a TCP port is open or closed on a domain name or IP address.
How to Use Port Checker
Check whether a TCP port is open or closed on any domain or IP address quickly and easily.
1
Enter a Host
Enter the domain name or IP address you want to test.
2
Choose a Port
Enter a port number such as 80, 443, 22, or select one of the popular ports.
3
Check the Result
Click Check Port to see whether the port is open, closed, or filtered.
Important Information
Port scan results may be affected by firewalls, NAT, hosting restrictions, or network security rules.
Frequently Asked Questions
A Port Checker is a network tool that tests whether a specific TCP port is accessible on a domain name or IP address.
An open port means that the remote server is accepting TCP connections on that port.
A closed port means that no service is currently accepting connections on that port, or the connection is being blocked.
You can check any valid TCP port between 1 and 65535.
Common ports include 21 FTP, 22 SSH, 25 SMTP, 53 DNS, 80 HTTP, 443 HTTPS, 3306 MySQL, 3389 RDP, and 8080 HTTP Alternate.
A firewall, router, hosting provider, NAT configuration, or server security rule may prevent external connections to the port.
Yes. Enter your server’s public IP address or domain name and the port you want to test.