Tools
Diagnostics that read your connection live and store nothing.
CDN detector
Is a site behind a CDN? Three independent signals, shown with the evidence — never a guess dressed as fact.
Multi-region HTTP check
See how a site responds from around the world — status, total time, TLS and TTFB per region.
DNS lookup
Resolve any record type for a domain — A, AAAA, MX, NS, TXT, CNAME, CAA.
Who is hosting this site?
Find the host, network and country behind any domain — and explore them in the index.
Subnet calculator
CIDR in — network, range, mask and host count out. IPv4 and IPv6.
The journey of this request
Four hops between your machine and this page — read live from this request, never stored.
Whois (RDAP)
Registration data for any IP, AS number or domain — straight from the authoritative registry.
What's my IP?
Your public IP and what it reveals — read live from the edge, never stored.
WebRTC leak test
WebRTC can expose IPs your browser knows — even behind a VPN.
DNS leak test
See which resolver answers your DNS, and whether it's outside your network.
Browser fingerprint
How identifiable your browser is — computed here, never sent.
HTTP headers
The request headers your browser sends with every page.
User agent
How your browser identifies itself — parsed via Client Hints.