Online lookup: https://dns.google/

JSON-API: https://dns.google/resolve?name=nu.nl&type=A

Usable addresses: (e.g in Firefox > Network options)

Google: https://dns.google/dns-query

Cloudflare: https://cloudflare-dns.com/dns-query

OpenDNS: https://doh.opendns.com/dns-query

Self-hosted proxy: https://github.com/jedisct1/doh-server

# nginx config
location /doh {
  proxy_pass http://127.0.0.1:3000;
}

Another one: https://github.com/commonshost/dohnut

https://github.com/m13253/dns-over-https

296900cookie-checkDNS over HTTPSno