The Port Number Checker is a free online tool that helps you search, filter, and explore common TCP and UDP port numbers. Instantly find port details, protocols, security levels, and alternative ports. Perfect for network engineers, developers, and IT professionals.
A port number is a numerical identifier in networking used to specify a particular process or service on a device.
TCP (Transmission Control Protocol) is connection-oriented, while UDP (User Datagram Protocol) is connectionless and faster but less reliable.
Use the search bar above to enter a port number or service name and get instant results.
No, some ports are more secure than others. Always follow best practices and consult security guidelines.
Yes! Use the export buttons to download the filtered list as CSV or JSON.