Enter a domain or IP address to scan for open ports. Use this to detect exposed services or security risks.
Open ports reveal which services are running. Use this tool to monitor and reduce your server’s attack surface.
Our free port scanner helps with security audits, penetration testing, or checking firewall and router settings.
FAQS
What is Open Ports Lookup?
This tool scans a domain or IP to identify which TCP ports are open and accessible from the public internet.
How do I check open ports?
Just enter an IP address or domain name into the tool above. You’ll get a real-time scan of open TCP ports.
Why check for open ports?
Scanning ports helps identify security vulnerabilities or exposed services that could be exploited by attackers.
What are common open ports?
Ports like 21 (FTP), 22 (SSH), 80 (HTTP), and 443 (HTTPS) are commonly open depending on the server setup.
Is this tool safe to use?
Yes. It performs non-intrusive TCP scans and only checks for open ports — it does not exploit or harm systems.
Do I need to install anything?
No installation is needed. The Open Ports Lookup tool works fully online and is free to use without sign-up.