Online TCP Port Scanner

Scan Results

Welcome to Our Online TCP Port Scanner

Our TCP port scanning tool is a free resource that allows you to explore the 1000 most commonly used ports on a remote machine. Whether you want to scan well-known ports or specify a particular port, our service provides the necessary flexibility.

How Does Port Scanning Work?

Port scanning involves sending TCP requests to a remote machine. Each port corresponds to a specific service on the machine. For example, port 80 is associated with the HTTP protocol, port 443 with HTTPS, port 22 with SSH, and so on.

By sending requests to specific ports, our scanner receives responses indicating whether the port is open, closed, or filtered. An open port means it is ready to receive requests, while a closed port is not in use. A filtered port indicates that requests are ignored or blocked, often by a firewall.

Why Scan Ports?

Port scanning provides visibility into the network configuration of a machine. This helps diagnose potential issues and enhance security. For security professionals, discovering open ports is essential for detecting vulnerabilities and strengthening security posture. For an attacker, port scanning allows analysis of listening ports on the distant machine, enabling them to check for potential exploits to penetrate the remote machine.

List of Commonly Used Ports

Responsible Tool Usage

We emphasize that this tool is intended for educational and security testing purposes only. It should only be used on systems for which you have authorization to perform tests. Any misuse of this tool is strictly prohibited, and we disclaim any responsibility for fraudulent use.

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