EDNS Compliance Tester

Checking: 'ycombinator.com' as at 2026-03-18T02:06:59Z

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 (341bd48e3d2114ea2ad0792efc1e6e94 -)
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 (b414bbe1fe8abcf4f9ec9d93a39320c7 -)

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 (5aeaa5a0c29c87f0e32d29eb0056f49f -)
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 (b263f2727c43082753f77c3e563754ce -)

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 (cf5b370d58952f49e2ccdd3f47f44f37 -)
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 (cf5b370d58952f49e2ccdd3f47f44f37 -)

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 (beb81b8ee49f183b16c57c94e3868a7b -)
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 (288d05bae81531daf3bdfa34cebcc404 -)

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/9d4a2609e5

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.