type a domain, IP or URL and press enter. no flags = standard checks at once.
$ wheredns
$ wheredns
$ wheredns
$ wheredns
paste a full email header into the prompt to trace its hops. press ? for every flag.
┤ help · flags ├
usage: wheredns <target> [flag …] no flags → standard checks in parallel. subdomains is explicit-only. flags may use a -- prefix and can be combined.
examples (click to run)
targets: domain · IPv4 · IPv6 · public http(s) URL without credentials or query parameters · pasted email header. Network checks run from San Jose, CA, not your connection. Ping uses ten real ICMP echoes; blocked replies do not prove a website is down. Targets, results and history are kept only in this tab's memory. Pasted email headers are analyzed in your browser and never uploaded.