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Port Scanner Reference Guide
Interactive directory of common TCP/UDP ports.
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About Port Scanner Reference Guide
Search hundreds of common port assignments and their well-known services.
📐 Methodology & Reference Accuracy:
Calculations, formulas, and conversions execute locally in your web browser. Output models are benchmarked against official reference standards and updated for 2026.
🔒 This tool runs entirely in your browser. Nothing is uploaded or stored.
Background reading: Port Scanner Reference on Wikipedia. More: all security & network.
Frequently Asked Questions about Port Scanner Reference Guide
How do I use the Port Scanner Reference Guide?
Open the Port Scanner Reference Guide and use the controls in the workspace below: interactive directory of common tcp/udp ports. Results appear instantly in your browser, with nothing to install, sign up for, or pay for.
Is the Port Scanner Reference Guide free?
Yes. The Port Scanner Reference Guide is completely free, like every tool in the PrimeFreeTools library. There are no accounts, subscriptions, or usage limits.
Does the Port Scanner Reference Guide store or share my data?
No. The Port Scanner Reference Guide runs with JavaScript in your browser, so what you enter never leaves your device and nothing is stored on a server.
What can I use the Port Scanner Reference Guide for?
Search hundreds of common port assignments and their well-known services. You will find it grouped under Security & Network together with 13 other free tools on the PrimeFreeTools homepage.
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