Enter any domain or IP address and immediately discover which network ports are open, closed, or filtered on that server using our Open Ports Lookup tool.
Check all standard ports like HTTP (80), HTTPS (443), FTP (21), SSH (22) and more to understand a server's exposed services and network configuration.
Identify unintended open ports that could pose a security risk and verify your firewall rules are properly protecting your server infrastructure.
FAQS
What is an Open Ports Lookup?
An Open Ports Lookup scans a domain or IP address to identify which network ports are currently open and accepting connections on that server.
Why is it important to know which ports are open?
Open ports represent entry points into a server. Knowing which ones are exposed helps you identify security vulnerabilities and ensure only intended services are accessible.
Which ports does the tool scan by default?
The tool scans all commonly used ports including HTTP (80), HTTPS (443), FTP (21), SSH (22), SMTP (25), and many others used by standard services.
Can I scan a specific port number?
Yes, in addition to the default common port scan, you can specify a custom port number to check if a particular service or application is accessible on that server.
Is scanning ports on a domain I don't own legal?
Port scanning your own servers is perfectly legal and recommended for security audits. Scanning third-party servers without permission may violate terms of service or local laws.
How can I close an open port that should not be accessible?
To close an unintended open port, update your server's firewall rules or disable the service running on that port through your hosting control panel or server configuration.