https://dns.vallar.dk/dns-query
Another example of use
curl -H "Content-Type: application/dns-message" \
--data-binary @query.bin \
https://dns.vallar.dk/dns-query
curl "https://dns.vallar.dk/dns-query?dns=AAABAAABAAAAAAAAA3d3dwdleGFtcGxlA2NvbQAAAQAB"
curl "https://dns.vallar.dk/dns-query?name=example.com&type=A"