Free network tools
Understand how your Internet connection actually behaves
Public IP, DNS, TCP port, RDAP, HTTP header, TLS certificate and CIDR tools in one page. No unfinished tests are presented as working features.
Free · No sign-in
DNS Lookup
Resolve A, AAAA, CNAME, MX, TXT and NS records
PrivacyNo target domain is prefilled or probed automatically. A target is sent only after you enter it and start a check.