EDNS Compliance Tester

Checking: 'ycombinator.com' as at 2026-10-06T00:41:37Z

ycombinator.com. @205.251.199.122 (ns-1914.awsdns-47.co.uk.): dns=ok zflag=ok edns=ok edns1=ok edns@512=ok,notc ednsopt=ok edns1opt=ok do=ok ednsflags=ok docookie=ok edns512tcp=ok optlist=ok,nsid,subnet (7f92d8909f0bed699b8ad03845abf54f -)
ycombinator.com. @2600:9000:5307:7a00::1 (ns-1914.awsdns-47.co.uk.): dns=ok zflag=ok edns=ok edns1=ok edns@512=ok,notc ednsopt=ok edns1opt=ok do=ok ednsflags=ok docookie=ok edns512tcp=ok optlist=ok,nsid,subnet (aa4962a493d5045ef5f59ddf0ef6aba1 -)

ycombinator.com. @205.251.197.131 (ns-1411.awsdns-48.org.): dns=ok zflag=ok edns=ok edns1=ok edns@512=ok,notc ednsopt=ok edns1opt=ok do=ok ednsflags=ok docookie=ok edns512tcp=ok optlist=ok,nsid,subnet (f95410220c5245897f6a02f72ec85336 -)
ycombinator.com. @2600:9000:5305:8300::1 (ns-1411.awsdns-48.org.): dns=ok zflag=ok edns=ok edns1=ok edns@512=ok,notc ednsopt=ok edns1opt=ok do=ok ednsflags=ok docookie=ok edns512tcp=ok optlist=ok,nsid,subnet (828a0b2c2994b1e490c188aacee035bf -)

ycombinator.com. @205.251.192.225 (ns-225.awsdns-28.com.): dns=ok zflag=ok edns=ok edns1=ok edns@512=ok,notc ednsopt=ok edns1opt=ok do=ok ednsflags=ok docookie=ok edns512tcp=ok optlist=ok,nsid,subnet (de9c38719451769cff9fc4fd6c78abe7 -)
ycombinator.com. @2600:9000:5300:e100::1 (ns-225.awsdns-28.com.): dns=ok zflag=ok edns=ok edns1=ok edns@512=ok,notc ednsopt=ok edns1opt=ok do=ok ednsflags=ok docookie=ok edns512tcp=ok optlist=ok,nsid,subnet (94e9294bde97c8c24326952d5f9f72a8 -)

ycombinator.com. @205.251.194.44 (ns-556.awsdns-05.net.): dns=ok zflag=ok edns=ok edns1=ok edns@512=ok,notc ednsopt=ok edns1opt=ok do=ok ednsflags=ok docookie=ok edns512tcp=ok optlist=ok,nsid,subnet (cc245f0d04dc2f793407182297f71bb3 -)
ycombinator.com. @2600:9000:5302:2c00::1 (ns-556.awsdns-05.net.): dns=ok zflag=ok edns=ok edns1=ok edns@512=ok,notc ednsopt=ok edns1opt=ok do=ok ednsflags=ok docookie=ok edns512tcp=ok optlist=ok,nsid,subnet (a55c6559b2ec9439117c96d00df27353 -)

All Ok

Codes

ok - test passed.
nsid - NSID supported [RFC5001].
subnet - EDNS Client Subnet supported [RFC7871].

To retrieve this report in the future: https://ednscomp.isc.org/ednscomp/be3846e049

The source code for the tester can be downloaded from ISC Open Source Projects / DNS-Compliance-Testing.

For more information about EDNS please see the main site.