Scan a list of TCP ports on a host to see which are open — useful for a quick check across several common ports at once.
Frequently asked questions
Enter a comma-separated list of specific ports (e.g. "22,80,443,3306") — there's no fixed limit, but keep lists reasonable for faster results.
Use this on your own servers or ones you have explicit permission to test — scanning third-party infrastructure without authorization may violate their terms of service.