cloudflare info
$ curl -H 'accept: application/dns-message' -v 'https://cloudflare-dns.com/dns-query?dns=q80BAAABAAAAAAAAA3d3dwdleGFtcGxlA2NvbQAAAQAB' | hexdump* Using HTTP2, server supports multi-use* Connection state changed (HTTP/2 confirmed)* Copying HTTP/2 data in stream buffer to connection buffer after upgrade: len=0* Using Stream ID: 1 (easy handle 0x7f968700a400)GET /dns-query?dns=q80BAAABAAAAAAAAA3d3dwdleGFtcGxlA2NvbQAAAQAB HTTP/2Host: cloudflare-dns.comUser-Agent: curl/7.54.0accept: application/dns-message
* Connection state changed (MAX_CONCURRENT_STREAMS updated)!HTTP/2 200date: Fri, 23 Mar 2018 05:14:02 GMTcontent-type: application/dns-messagecontent-length: 49cache-control: max-age=0set-cookie: \__cfduid=dd1fb65f0185fadf50bbb6cd14ecbc5b01521782042; expires=Sat, 23-Mar-19 05:14:02 GMT; path=/; domain=.cloudflare.com; HttpOnlyserver: cloudflare-nginxcf-ray: 3ffe69838a418c4c-SFO-DOG
{ [49 bytes data]100 49 100 49 0 0 493 0 --:--:-- --:--:-- --:--:-- 494* Connection #0 to host cloudflare-dns.com left intact0000000 ab cd 81 80 00 01 00 01 00 00 00 00 03 77 77 770000010 07 65 78 61 6d 70 6c 65 03 63 6f 6d 00 00 01 000000020 01 c0 0c 00 01 00 01 00 00 0a 8b 00 04 5d b8 d80000030 220000031