ustcori.com

Checked 22 October 2026, 11:20 UTC · via 8.8.8.8
✗Problems found
20 passed 3 warnings 1 failed 7 info

Registration

info

.com generic · Alibaba Cloud Computing (Beijing) Co., Ltd. · expires 2030-02-09

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Alibaba Cloud Computing (Beijing) Co., Ltd.
Registered
9 February 2009
Last changed
27 November 2022
Expires
9 February 2030
Status
active
Registry nameservers
dns29.hichina.com, dns30.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 2030-02-09 #3
    The registration is valid until 2030-02-09 (1205 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

dns29.hichina.com, dns30.hichina.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
dns29.hichina.com, dns30.hichina.com
NS in the zone
dns29.hichina.com, dns30.hichina.com
NameserverAddressesNetwork (AS)Glue
dns29.hichina.com120.76.107.59 139.224.142.109 120.76.107.39 139.224.142.99 39.96.153.39 39.96.153.59 47.118.199.219 47.118.199.199 2408:4009:501::37AS37963 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., CN120.76.107.39 120.76.107.59 139.224.142.109 139.224.142.99 2408:4009:501::37 39.96.153.39 39.96.153.59 47.118.199.199 47.118.199.219
dns30.hichina.com120.76.107.62 139.224.142.107 47.118.199.197 139.224.142.102 39.96.153.62 120.76.107.37 39.96.153.37 47.118.199.221 2408:4009:501::38AS37963 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., CN120.76.107.37 120.76.107.62 139.224.142.102 139.224.142.107 2408:4009:501::38 39.96.153.37 39.96.153.62 47.118.199.197 47.118.199.221

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns29.hichina.com, dns30.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
dns29.hichina.com 120.76.107.59NOERROR, 205 ms, authoritativenoyes / yesrefused-
dns29.hichina.com 139.224.142.109NOERROR, 167 ms, authoritativenoyes / yesrefused-
dns29.hichina.com 120.76.107.39NOERROR, 214 ms, authoritativenoyes / yesrefused-
dns29.hichina.com 139.224.142.99NOERROR, 217 ms, authoritativenoyes / yesrefused-
dns29.hichina.com 39.96.153.39NOERROR, 142 ms, authoritativenoyes / yesrefused-
dns29.hichina.com 39.96.153.59NOERROR, 141 ms, authoritativenoyes / yesrefused-
dns29.hichina.com 47.118.199.219NOERROR, 234 ms, authoritativenoyes / yesrefused-
dns29.hichina.com 47.118.199.199NOERROR, 199 ms, authoritativenoyes / yesrefused-
dns29.hichina.com 2408:4009:501::37no responsenono / no--
dns30.hichina.com 120.76.107.62NOERROR, 216 ms, authoritativenoyes / yesrefused-
dns30.hichina.com 139.224.142.107NOERROR, 194 ms, authoritativenoyes / yesrefused-
dns30.hichina.com 47.118.199.197NOERROR, 171 ms, authoritativenoyes / yesrefused-
dns30.hichina.com 139.224.142.102NOERROR, 208 ms, authoritativenoyes / yesrefused-
dns30.hichina.com 39.96.153.62NOERROR, 160 ms, authoritativenoyes / yesrefused-
dns30.hichina.com 120.76.107.37NOERROR, 214 ms, authoritativenoyes / yesrefused-
dns30.hichina.com 39.96.153.37NOERROR, 175 ms, authoritativenoyes / yesrefused-
dns30.hichina.com 47.118.199.221NOERROR, 235 ms, authoritativenoyes / yesrefused-
dns30.hichina.com 2408:4009:501::38NOERROR, 198 ms, authoritativenoyes / yesrefused-

Checks

  • ✗
    Nameservers not responding
    These addresses did not answer, so resolvers waste time on timeouts: dns29.hichina.com (2408:4009:501::37): read udp [2a01:4f8:1c1c:eebf::1]:58663->[2408:4009:501::37]: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 2026082616 · primary dns29.hichina.com

Found

Primary (MNAME)
dns29.hichina.com
Contact (RNAME)
hostmaster.hichina.com
Serial
2026082616
Refresh / retry
3600 s / 1200 s
Expire
86400 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
dns29.hichina.com (120.76.107.59)2026082616
dns29.hichina.com (139.224.142.109)2013052800
dns29.hichina.com (120.76.107.39)2026082617
dns29.hichina.com (139.224.142.99)2013052800
dns29.hichina.com (39.96.153.39)2026082616
dns29.hichina.com (39.96.153.59)2026082616
dns29.hichina.com (47.118.199.219)2026082616
dns29.hichina.com (47.118.199.199)2026082617
dns30.hichina.com (120.76.107.62)2026082616
dns30.hichina.com (139.224.142.107)2026082616
dns30.hichina.com (47.118.199.197)2026082617
dns30.hichina.com (139.224.142.102)2026082616
dns30.hichina.com (39.96.153.62)2026082617
dns30.hichina.com (120.76.107.37)2026082616
dns30.hichina.com (39.96.153.37)2026082616
dns30.hichina.com (47.118.199.221)2026082616
dns30.hichina.com (2408:4009:501::38)2026082509

Checks

  • !
    Serials differ
    The nameservers serve different versions of the zone: 2013052800 on dns29.hichina.com (139.224.142.109), dns29.hichina.com (139.224.142.99); 2026082509 on dns30.hichina.com (2408:4009:501::38); 2026082616 on dns29.hichina.com (120.76.107.59), dns29.hichina.com (39.96.153.39), dns29.hichina.com (39.96.153.59), dns29.hichina.com (47.118.199.219), dns30.hichina.com (120.76.107.62), dns30.hichina.com (139.224.142.107), dns30.hichina.com (139.224.142.102), dns30.hichina.com (120.76.107.37), dns30.hichina.com (39.96.153.37), dns30.hichina.com (47.118.199.221); 2026082617 on dns29.hichina.com (120.76.107.39), dns29.hichina.com (47.118.199.199), dns30.hichina.com (47.118.199.197), dns30.hichina.com (39.96.153.62). 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 dns29.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 2026082616 follows the YYYYMMDDnn convention (2026-08-26).

DNSSEC

warn

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

Records

info

5 records at the apex

Found

Read from
120.76.107.59:53
TypeValueTTL
SOAdns29.hichina.com. hostmaster.hichina.com. 2026082616 3600 1200 86400 600600
A183.162.239.157600
MX5 mxbiz1.qq.com.600
MX10 mxbiz2.qq.com.600
TXT"v=spf1 include:spf.mail.qq.com ~all"600

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, MX 10m.
  • ✓ 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