Open Port
Checker
Quickly verify network port accessibility for seamless connectivity and security. Test if a specific port is open on any IP address or hostname.
Port is Open!
Port on is accepting connections.
Port is Closed
Port on is not accepting connections or is filtered.
Possible Reasons
- • The service is not running on the target host
- • A firewall is blocking the connection
- • The host is not reachable from the internet
- • Port forwarding is not configured correctly
Unable to Check Port
What is a Port Checker?
A Port Checker is an effective online tool designed to check open ports on your device, computer, or server. This tool is essential for troubleshooting connection issues with applications such as email clients or instant messaging programs that may be hindered by port blocking from your ISP or your router's firewall.
Why Use a Port Checker?
Troubleshoot Connection Issues
Diagnose why applications like email clients, remote desktop, or gaming servers aren't connecting properly.
Verify Port Forwarding
Ensure your router's port forwarding settings are correctly configured for hosting servers like Minecraft or web applications.
Network Security Auditing
Identify which ports are open or closed on your network to enhance security and prevent unauthorized access.
Email Server Configuration
Verify that SMTP, IMAP, and POP3 ports are accessible for proper email delivery and retrieval.
Common Network Ports Reference
Quick reference guide to commonly used network ports. Click any port to automatically fill the form above.
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