HTTP Redirect Chain Checker
Follow a URL through its 301, 302, 307 and 308 redirects, hop by hop, up to...
Network & DNS
Look up what a domain and a server are doing: DNS records, WHOIS and registration data, redirect chains, HTTP status codes and response headers. The lookups run from this server, not from your browser, so results can differ from what you see locally.
HTTP Response Headers Checker
Fetch a URL and see its response headers grouped into security, caching, content, server and other....
WHOIS / RDAP Domain Lookup
Look up a domain's registrar, creation and expiry dates, name servers and status codes through RDAP....
Domain Age Checker
Find out how old a domain is: creation date, expiry date and age, taken from RDAP...
HTTP Status Code Checker
Request a URL with GET or HEAD and see its HTTP status code, response time, content...
Domain to IP Lookup
Resolve a domain to its public IPv4 and IPv6 addresses, with reverse DNS names where available....
Technical notes
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