Open Ports Lookup
Validation Error
Port Status Results
No Ports Found
No port entries match the active filter criteria.
Scan commonly used TCP ports to identify which network services are accessible from the internet and verify that only the intended services are publicly available.
Verify whether important services such as HTTP, HTTPS, SSH, FTP, SMTP, and other common ports are reachable and responding correctly.
Review open network services to help troubleshoot connectivity issues, validate server configurations, and better understand your website infrastructure.
Frequently Asked Questions
What is an Open Port Checker?
An Open Port Checker scans a server or IP address to determine whether specific TCP ports are accessible from the internet. It helps identify which network services are publicly available.
Why should I check open ports?
Checking open ports helps verify that only the required services are accessible. It is useful for troubleshooting connectivity, validating server configuration, and reducing unnecessary network exposure.
Which ports are commonly scanned?
Commonly checked ports include 21 (FTP), 22 (SSH), 25 (SMTP), 53 (DNS), 80 (HTTP), 110 (POP3), 143 (IMAP), 443 (HTTPS), 3306 (MySQL), and 3389 (Remote Desktop).
What does a filtered port mean?
A filtered port usually indicates that a firewall or network device is blocking or silently dropping connection requests. As a result, the scanner cannot determine whether the port is open or closed.
Can I scan any server or IP address?
Open Port Checker should only be used on servers or network resources that you own or have permission to test. Always comply with applicable laws and the policies of the systems you manage.
Can I use Open Port Checker with other DomainScan tools?
Yes. Combine Open Port Checker with SSL Checker, DNS Lookup, WHOIS Lookup, Domain Location Lookup, and Reverse IP Lookup for a more complete analysis of your server and network configuration.