Find the DNS provider of a domain

Find which company hosts a domain's DNS records, from its nameservers. This does not check the Thundermail records: for that, use the Thundermail DNS checker. Need help? Contact Support.

Lookups run entirely in your browser via DNS-over-HTTPS. No server, nothing is stored. The command-line version is dns_provider.py.

Thundermail DNS checker · Release notes · Source on GitHub