EDNS Compliance Tester

Checking: 'ycombinator.com' as at 2026-01-17T22:41:27Z

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 (4b5a8dfe5dfd47c865b0d1dfb097476b -)
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 (4b5a8dfe5dfd47c865b0d1dfb097476b -)

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 (f71ad64dbb8b67626006f0bf0922b8ba -)
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 (f71ad64dbb8b67626006f0bf0922b8ba -)

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 (b4123658a0eee083ee9500a3ec999377 -)
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 (4df473278e2a6a2202922f754de6aa1f -)

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 (2d031b0c6461948321a579537938df4a -)
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 (c712bf3962980f74ce90638ed5d5fb4e -)

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/8e0bf2cff0

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.