ABOUT

check.systems

check.systems is a free network diagnostic tool. Load the homepage and instantly see what the internet can see about your connection — your public IP, location, ISP, TLS version, whether you're behind a VPN, and more.

Beyond the homepage reveal dashboard, we run server-side tools for ping, DNS lookup, traceroute, WHOIS, and IP lookup — useful for anyone troubleshooting connectivity or just curious about how the internet works.

What we offer

Connection reveal IP, location, ISP, ASN, TLS, VPN detection, WebRTC leak check
Ping test Round-trip latency and packet loss to any host
DNS lookup A, AAAA, MX, TXT, CNAME, NS, SOA records for any domain
Traceroute Hop-by-hop path from our server to any destination
IP lookup Geolocation, ISP, ASN, reverse DNS for any IP address
WHOIS Domain registration details, registrar, expiry, name servers
Articles Plain-English guides on networking, VPNs, DNS, and troubleshooting

Privacy

Your IP and connection data are used only to generate the results you see on screen. We don't sell data, we don't build profiles, and we don't store your IP beyond the current request. See our privacy policy for details.

Contact

Questions or feedback: contact form or contact@check.systems.