tlddst.com

Checked 22 October 2026, 11:10 UTC · via 8.8.8.8
✗Problems found
20 passed 2 warnings 1 failed 8 info

Registration

info

.com generic · Alibaba Cloud Computing (Beijing) Co., Ltd. · expires 2030-12-08

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Alibaba Cloud Computing (Beijing) Co., Ltd.
Registered
8 December 2020
Last changed
8 December 2020
Expires
8 December 2030
Status
active
Registry nameservers
dns3.hichina.com, dns4.hichina.com
RDAP server
https://rdap.verisign.com/com/v1/

Checks

  • i
    .com is a generic TLD (gTLD)
    Generic TLD under an ICANN registry agreement: ICANN-accredited registrars, UDRP and RDAP apply.
    #1
  • ✓ TLD delegated and signed #2
    .com is delegated in the root zone and DNSSEC-signed.
  • ✓ Expires on 2030-12-08 #3
    The registration is valid until 2030-12-08 (1507 days).
  • i
    No transfer lock
    The domain has no transfer lock (status: active). A registrar lock protects against unauthorized transfers.
    #4
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

dns3.hichina.com, dns4.hichina.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
dns3.hichina.com, dns4.hichina.com
NS in the zone
dns3.hichina.com, dns4.hichina.com
NameserverAddressesNetwork (AS)Glue
dns3.hichina.com120.76.107.43 139.224.142.123 47.118.199.213 39.96.153.43 47.118.199.203 139.224.142.113 120.76.107.63 39.96.153.63 2408:4009:501::11AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN120.76.107.43 120.76.107.63 139.224.142.113 139.224.142.123 2408:4009:501::11 39.96.153.43 39.96.153.63 47.118.199.203 47.118.199.213
dns4.hichina.com120.76.107.44 39.96.153.44 120.76.107.54 39.96.153.54 139.224.142.124 139.224.142.114 47.118.199.204 47.118.199.214 2408:4009:501::12AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN120.76.107.44 120.76.107.54 139.224.142.114 139.224.142.124 2408:4009:501::12 39.96.153.44 39.96.153.54 47.118.199.204 47.118.199.214

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns3.hichina.com, dns4.hichina.com.
    #6
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ No glue needed #8
    All nameservers are outside the zone, so no glue records are needed.
  • ✓ 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 2408:4009:501::/48, while the other address family is spread over several networks.
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS37963 (ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN): 18 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • 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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

fail

17 of 18 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns3.hichina.com 120.76.107.43NOERROR, 206 ms, authoritativenoyes / yesrefused-
dns3.hichina.com 139.224.142.123NOERROR, 192 ms, authoritativenoyes / yesrefused-
dns3.hichina.com 47.118.199.213NOERROR, 227 ms, authoritativenoyes / yesrefused-
dns3.hichina.com 39.96.153.43NOERROR, 152 ms, authoritativenoyes / yesrefused-
dns3.hichina.com 47.118.199.203NOERROR, 234 ms, authoritativenoyes / yesrefused-
dns3.hichina.com 139.224.142.113NOERROR, 190 ms, authoritativenoyes / yesrefused-
dns3.hichina.com 120.76.107.63NOERROR, 199 ms, authoritativenoyes / yesrefused-
dns3.hichina.com 39.96.153.63NOERROR, 151 ms, authoritativenoyes / yesrefused-
dns3.hichina.com 2408:4009:501::11no responsenono / no--
dns4.hichina.com 120.76.107.44NOERROR, 204 ms, authoritativenoyes / yesrefused-
dns4.hichina.com 39.96.153.44NOERROR, 164 ms, authoritativenoyes / yesrefused-
dns4.hichina.com 120.76.107.54NOERROR, 205 ms, authoritativenoyes / yesrefused-
dns4.hichina.com 39.96.153.54NOERROR, 153 ms, authoritativenoyes / yesrefused-
dns4.hichina.com 139.224.142.124NOERROR, 191 ms, authoritativenoyes / yesrefused-
dns4.hichina.com 139.224.142.114NOERROR, 160 ms, authoritativenoyes / yesrefused-
dns4.hichina.com 47.118.199.204NOERROR, 230 ms, authoritativenoyes / yesrefused-
dns4.hichina.com 47.118.199.214NOERROR, 238 ms, authoritativenoyes / yesrefused-
dns4.hichina.com 2408:4009:501::12NOERROR, 209 ms, authoritativenoyes / yesrefused-

Checks

  • ✗
    Nameservers not responding
    These addresses did not answer, so resolvers waste time on timeouts: dns3.hichina.com (2408:4009:501::11): read udp [2a01:4f8:1c1c:eebf::1]:33075->[2408:4009:501::11]:53: i/o timeout.
    #14
  • ✓ All authoritative #15
    Every responding nameserver answers authoritatively for the zone.
  • ✓ No recursion #16
    The nameservers do not answer recursive queries for other domains.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✓ TCP supported #19
    All nameservers answer over TCP.
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

warn

serial 2026082509 · primary dns3.hichina.com

Found

Primary (MNAME)
dns3.hichina.com
Contact (RNAME)
hostmaster.hichina.com
Serial
2026082509
Refresh / retry
3600 s / 1200 s
Expire
86400 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
dns3.hichina.com (120.76.107.43)2026082509
dns3.hichina.com (139.224.142.123)2026082509
dns3.hichina.com (47.118.199.213)2026082815
dns3.hichina.com (39.96.153.43)2026082616
dns3.hichina.com (47.118.199.203)2026082616
dns3.hichina.com (139.224.142.113)2026082709
dns3.hichina.com (120.76.107.63)2026082616
dns3.hichina.com (39.96.153.63)2026082617
dns4.hichina.com (120.76.107.44)2026081813
dns4.hichina.com (39.96.153.44)2026082616
dns4.hichina.com (120.76.107.54)2026082617
dns4.hichina.com (39.96.153.54)2026082617
dns4.hichina.com (139.224.142.124)2026082616
dns4.hichina.com (139.224.142.114)2026082616
dns4.hichina.com (47.118.199.204)2026082616
dns4.hichina.com (47.118.199.214)2026082616
dns4.hichina.com (2408:4009:501::12)2026082509

Checks

  • !
    Serials differ
    The nameservers serve different versions of the zone: 2026081813 on dns4.hichina.com (120.76.107.44); 2026082509 on dns3.hichina.com (120.76.107.43), dns3.hichina.com (139.224.142.123), dns4.hichina.com (2408:4009:501::12); 2026082616 on dns3.hichina.com (39.96.153.43), dns3.hichina.com (47.118.199.203), dns3.hichina.com (120.76.107.63), dns4.hichina.com (39.96.153.44), dns4.hichina.com (139.224.142.124), dns4.hichina.com (139.224.142.114), dns4.hichina.com (47.118.199.204), dns4.hichina.com (47.118.199.214); 2026082617 on dns3.hichina.com (39.96.153.63), dns4.hichina.com (120.76.107.54), dns4.hichina.com (39.96.153.54); 2026082709 on dns3.hichina.com (139.224.142.113); 2026082815 on dns3.hichina.com (47.118.199.213). This is normal for a few minutes after a change; if it lasts, zone transfers to the secondaries are failing.
    #22
  • !
    Unusual SOA timers
    expire 1d is shorter than 7d; secondaries stop answering too soon when the primary is down. Current values: refresh 1h, retry 20m, expire 1d, negative TTL 10m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns3.hichina.com is one of the listed nameservers.
  • ✓ Contact hostmaster@hichina.com #25
    The SOA RNAME hostmaster.hichina.com means hostmaster@hichina.com.
  • ✓ Date-based serial #26
    The serial 2026082509 follows the YYYYMMDDnn convention (2026-08-25).

DNSSEC

info

Not signed

Found

Validated by resolver
no
Lookup error: read udp 46.225.38.91:45339->120.76.107.43:53: i/o timeout

Checks

  • i
    Could not be checked
    The DNSSEC lookup failed, so this could not be checked: read udp 46.225.38.91:45339->120.76.107.43:53: i/o timeout
    #27

Records

info

2 records at the apex

Found

Read from
120.76.107.43:53
TypeValueTTL
NSdns3.hichina.com.86400
NSdns4.hichina.com.86400

Checks

  • ✓ TTLs within range #32
    TTLs: NS 1d. The NS TTL at the parent is 2d and in the zone 1d; resolvers may use either.
  • ✓ 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