Open Port Scanner
Probe a curated set of well-known TCP ports to see which services are reachable.
Enter a value above and run the check to see results here.
How it works
Probe a curated set of well-known TCP ports to see which services are reachable.
Frequently asked questions
Is the Open Port Scanner tool free to use?+
Yes. The Open Port Scanner runs directly in NetInsight with no signup required. Free-tier usage is rate limited to keep the service fast for everyone.
Are my queries logged?+
Diagnostic inputs are processed to produce your result and are not sold or shared. See our Privacy Policy for full detail on retention.
How accurate are the Open Port Scanner results?+
Results are fetched live from authoritative sources each time you run a check, so they reflect the current state rather than a cached snapshot.