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Scan any domain or IP address for open, closed, or filtered ports using TCP or UDP protocols. Learn how to use our port checker tool, what ports to scan, and how to troubleshoot common issues.
Find open ports and running services (incl. versions), and do OS fingerprinting in a single TCP port check. Inspect Top 100 TCP and UDP ports for free or get a paid plan to automate and schedule extensive custom scans for even more ports. Each Nmap port scan against a target IP address or hostname automatically maps the attack surface and gives ...
With this online TCP port scanner you can scan an IP address for open ports. Use this TCP port scan tool to check what services (apache, mail, ssh, ftp, mysql, telnet, dns) are running on your server, test if your firewall is working correctly, view open TCP ports.
Port Checker is a simple tool to check for open ports and test port forwarding setup on your router. Verify and diagnose connection errors on your computer.
Find open ports with our free online port scanner powered by Nmap. Scan up to 100 TCP or UDP ports of your choice, or the top 100 most common ports. Simply enter a target IP address, specify the protocol and ports to be scanned, and let our port scanner get to work.
Nmap is a free and open-source network scanner. Nmap is used to discover hosts and services on a computer network by sending packets and analyzing the responses. Nmap provides a number of features for probing computer networks, including host discovery and service and operating system detection.
Port Checker. Use our port scanner to check the status of the ports of any IP address or host. Enter the IP address or hostname in the provided fields and specify the ports you need to check.
