Port Checker
Test whether a TCP port is open and reachable on a host.
How to Use the Port Checker
- Enter a host, MAC address or ASN in the field above. Example values are pre-filled where helpful.
- Press the main action button to run the tool. Most results appear instantly.
- Review the results. Values can be selected and copied; some tools offer a download button.
- Adjust the input or options and run again to compare results.
What the Port Checker Does
Test whether a TCP port is open and reachable on a host. It is part of the Network Tools collection on MIKRODINET, a growing set of free utilities for site owners, developers, network administrators and curious users.
When to Use It
Use the Port Checker when troubleshooting, auditing a website, preparing a launch, learning how the underlying technology works or double-checking results from another service. Combining it with related tools gives a fuller picture.
Related Reading and Tools
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External References
Frequently Asked Questions
Is the Port Checker free to use?
Yes. The Port Checker on MIKRODINET is completely free, with no sign-up required.
Is my data safe when I use the Port Checker?
Tools that work offline process everything in your browser. Network checks send only the host or URL you enter, and queries are not stored.
How accurate is the Port Checker?
Results come from live public data or standard algorithms at the moment you run the check. For critical decisions, confirm results with a second source.