About PortCheck
Who we are and why this tool exists
Our Mission
PortCheck was built to answer one specific, everyday question quickly and without friction: “Is this TCP port on my connection actually reachable from the internet?” Anyone who has configured a home server, set up port forwarding for a game server, exposed a self-hosted application, or debugged a firewall rule has run into this exact problem. Existing tools were often cluttered with ads, required installing software, or buried the answer behind unnecessary steps. We wanted a page that loads fast, detects your public IP automatically, and gives you a clear, honest answer.
How PortCheck Is Different
- No account, sign-up, or installation required.
- Your public IP is detected server-side so results are accurate, not spoofable.
- We explain why a port might appear closed instead of just showing a red X.
- The site is intentionally lightweight — no database, no tracking beyond basic analytics.
- Rate limiting protects the service from abuse so it stays free and fast for everyone.
Who Runs PortCheck
PortCheck is developed and maintained by NikaURL, a small team building focused, single-purpose web utilities. We favour tools that do one job well over bloated all-in-one dashboards.
How the Check Works
When you click “Check Port”, our backend attempts a real TCP handshake from our servers to your detected public IP address on the port you specify. We never trust a client-supplied IP address for the connection attempt — the server always determines your address itself from the request. The result you see (open, refused, or timed out) reflects the actual outcome of that connection attempt at that moment. See our guides for a deeper explanation of what each result means and how to fix common problems.
Feedback
Found a bug, have a feature request, or want to report abuse? Visit our Contact page.