huya.com

ns1.huyatvns.com, ns2.huyatvns.com, vip3.alidns.com, vip4.alidns.com

Found

Parent zone

com

Delegation from

a.gtld-servers.net (192.5.6.30)

NS at the parent

ns1.huyatvns.com, ns2.huyatvns.com, vip3.alidns.com, vip4.alidns.com

NS in the zone

ns1.huyatvns.com, ns2.huyatvns.com, vip3.alidns.com, vip4.alidns.com

Checks

• ✓ 4 nameservers #6

  Delegated to ns1.huyatvns.com, ns2.huyatvns.com, vip3.alidns.com, vip4.alidns.com.
• ✓ Parent and zone agree #7

  The parent delegation and the zone's NS records list the same nameservers.
• !

  Glue differs from the zone

  The addresses at the parent (glue) differ from the addresses in the zone: vip3.alidns.com (glue 121.40.6.163, 140.205.1.5, 170.33.32.210, 170.33.73.26, 170.33.80.10, 2408:4009:500::3, 39.103.26.212, 47.108.36.163, 47.116.84.178, 8.129.152.245, 8.212.93.3, zone 8.212.93.3, 170.33.73.26, 170.33.80.10, 170.33.32.210, 140.205.1.5, 2408:4009:500::3); vip4.alidns.com (glue 121.40.6.164, 140.205.1.6, 170.33.32.211, 170.33.73.27, 170.33.80.11, 2408:4009:500::4, 39.103.26.213, 47.108.36.164, 47.116.84.179, 8.129.152.246, 8.212.93.4, zone 170.33.80.11, 170.33.32.211, 170.33.73.27, 140.205.1.6, 8.212.93.4, 2408:4009:500::4). Update the glue at your registrar.

  #8
• ✓ All names resolve #9

  Every nameserver name has an address and is not an alias.
• i

  One address family in one network

  all IPv6 addresses are in 2408:4009:500::/48, while the other address family is spread over several networks.

  #10
• ✓ 4 autonomous systems #11

  The nameservers are spread over: AS134963 (ASEPL-AS-AP - Alibaba Cloud (Singapore) Private Limited, SG): 2 addresses; AS37963 (ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN): 7 addresses; AS45090 (TENCENT-NET-AP - Shenzhen Tencent Computer Systems Company Limited, CN): 4 addresses; AS45102 (ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN): 9 addresses.
• i

  All nameserver names under .com

  All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.

  #12
• i

  Partly IPv6

  These nameservers have no IPv6 address: ns1.huyatvns.com, ns2.huyatvns.com.

  #13

serial 1792656462 · primary ns1.huyatvns.com

Found

Primary (MNAME)

ns1.huyatvns.com

Contact (RNAME)

dns.yy.com

Serial

1792656462

Refresh / retry

900 s / 180 s

Expire

1209600 s

Negative TTL

180 s

Serial per nameserver

Checks

• !

  Serials differ

  The nameservers serve different versions of the zone: 1792656444 on ns1.huyatvns.com (129.211.153.238), ns2.huyatvns.com (129.211.153.238); 1792656462 on ns1.huyatvns.com (39.96.18.9), ns2.huyatvns.com (39.96.18.9); 1792656463 on ns1.huyatvns.com (47.102.40.51); 1792656482 on ns2.huyatvns.com (47.102.40.51); 1792656512 on ns1.huyatvns.com (112.74.41.70), ns2.huyatvns.com (112.74.41.70); 1792656530 on ns1.huyatvns.com (111.230.121.202), ns2.huyatvns.com (111.230.121.202); 2019052919 on vip3.alidns.com (170.33.80.10), vip4.alidns.com (170.33.80.11), vip4.alidns.com (170.33.73.27), vip4.alidns.com (2408:4009:500::4); 2026081316 on vip4.alidns.com (8.212.93.4); 2026081712 on vip3.alidns.com (170.33.32.210); 2026081810 on vip3.alidns.com (8.212.93.3), vip3.alidns.com (170.33.73.26), vip3.alidns.com (2408:4009:500::3), vip4.alidns.com (170.33.32.211), vip4.alidns.com (140.205.1.6); 2026082415 on vip3.alidns.com (140.205.1.5). This is normal for a few minutes after a change; if it lasts, zone transfers to the secondaries are failing.

  #22
• !

  Unusual SOA timers

  refresh 15m is outside 20m–1d; negative caching TTL (minimum) 3m is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 15m, retry 3m, expire 14d, negative TTL 3m.

  #23
• ✓ Primary is a public nameserver #24

  The primary nameserver ns1.huyatvns.com is one of the listed nameservers.
• ✓ Contact dns@yy.com #25

  The SOA RNAME dns.yy.com means dns@yy.com.
• ✓ Timestamp serial #26

  The serial 1792656462 is a Unix timestamp (2026-10-22 08:07 UTC).

Not signed

Found

Validated by resolver

no

Checks

• !

  Not signed

  The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.

  #27

13 records at the apex

Found

Read from

39.96.18.9:53

Checks

• !

  Very low TTLs

  These records have a TTL below 5m, causing extra queries and slower lookups: A (1m), MX (2m). Low TTLs are useful just before a planned change.

  #32
• ✓ No CNAME at the apex #33

  The zone apex has no CNAME record.
• ✓ No wildcard #34

  Names that don't exist return NXDOMAIN.
• i

  No CAA records

  Without CAA records any certificate authority may issue certificates for this domain. A CAA record limits issuance to the CAs you use.

  #35