Check if your favorite websites are online or experiencing downtime. This tool allows you to quickly test the real-time availability of any website. Just enter the URL, and our online checker will perform a live status test on the domain.
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What is Port Checker?
A Port Checker is a free and easy-to-use online tool that helps you check for open ports on your computer or device. It is especially useful for testing port forwarding settings on your router. If you're experiencing connection issues with applications like email clients or instant messengers, this tool can help identify potential firewall or ISP-related problems. Additionally, it serves a security function by verifying whether specific ports are open or closed. For instance, if you're hosting a game server (e.g., Minecraft), you can use this tool to ensure the correct port (e.g., 25565) is properly forwarded.
Most Commonly Used Ports:
Port numbers range from 1 to 65,535. Well-known ports (0-1023) are assigned by IANA for standard protocols such as HTTP, SMTP, and FTP. Other categories include registered ports (1024-49151) and dynamic/private ports (49152-65535), which are frequently used for various applications.