unioncrediting.com

Checked 22 October 2026, 11:15 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 2027-05-07

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Alibaba Cloud Computing (Beijing) Co., Ltd.
Registered
7 May 2020
Last changed
7 April 2026
Expires
7 May 2027
Status
active
Registry nameservers
dns31.hichina.com, dns32.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 2027-05-07 #3
    The registration is valid until 2027-05-07 (196 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

dns31.hichina.com, dns32.hichina.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
dns31.hichina.com, dns32.hichina.com
NS in the zone
dns31.hichina.com, dns32.hichina.com
NameserverAddressesNetwork (AS)Glue
dns31.hichina.com47.118.199.219 139.224.142.109 39.96.153.59 120.76.107.39 39.96.153.39 120.76.107.59 139.224.142.99 47.118.199.199 2408:4009:501::39AS37963 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::39 39.96.153.39 39.96.153.59 47.118.199.199 47.118.199.219
dns32.hichina.com47.118.199.197 120.76.107.37 39.96.153.37 139.224.142.102 139.224.142.107 120.76.107.62 47.118.199.221 39.96.153.62 2408:4009:501::40AS37963 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::40 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: dns31.hichina.com, dns32.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

16 of 18 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns31.hichina.com 47.118.199.219NOERROR, 208 ms, authoritativenoyes / yesrefused-
dns31.hichina.com 139.224.142.109NOERROR, 164 ms, authoritativenoyes / yesrefused-
dns31.hichina.com 39.96.153.59NOERROR, 145 ms, authoritativenoyes / yesrefused-
dns31.hichina.com 120.76.107.39NOERROR, 218 ms, authoritativenoyes / yesrefused-
dns31.hichina.com 39.96.153.39NOERROR, 151 ms, authoritativenoyes / yesrefused-
dns31.hichina.com 120.76.107.59NOERROR, 208 ms, authoritativenoyes / yesrefused-
dns31.hichina.com 139.224.142.99NOERROR, 219 ms, authoritativenoyes / yesrefused-
dns31.hichina.com 47.118.199.199NOERROR, 194 ms, authoritativenoyes / yesrefused-
dns31.hichina.com 2408:4009:501::39no responsenono / no--
dns32.hichina.com 47.118.199.197NOERROR, 206 ms, authoritativenoyes / yesrefused-
dns32.hichina.com 120.76.107.37NOERROR, 207 ms, authoritativenoyes / yesrefused-
dns32.hichina.com 39.96.153.37no responsenono / no--
dns32.hichina.com 139.224.142.102NOERROR, 180 ms, authoritativenoyes / yesrefused-
dns32.hichina.com 139.224.142.107NOERROR, 173 ms, authoritativenoyes / yesrefused-
dns32.hichina.com 120.76.107.62NOERROR, 207 ms, authoritativenoyes / yesrefused-
dns32.hichina.com 47.118.199.221NOERROR, 234 ms, authoritativenoyes / yesrefused-
dns32.hichina.com 39.96.153.62NOERROR, 159 ms, authoritativenoyes / yesrefused-
dns32.hichina.com 2408:4009:501::40NOERROR, 193 ms, authoritativenoyes / yesrefused-

Checks

  • ✗
    Nameservers not responding
    These addresses did not answer, so resolvers waste time on timeouts: dns31.hichina.com (2408:4009:501::39): read udp [2a01:4f8:1c1c:eebf::1]:42500->[2408:4009:501::39]:53: i/o timeout; dns32.hichina.com (39.96.153.37): read udp 46.225.38.91:46726->39.96.153.37:53: 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 2026082815 · primary dns31.hichina.com

Found

Primary (MNAME)
dns31.hichina.com
Contact (RNAME)
hostmaster.hichina.com
Serial
2026082815
Refresh / retry
3600 s / 1200 s
Expire
86400 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
dns31.hichina.com (47.118.199.219)2026082815
dns31.hichina.com (139.224.142.109)2020050713
dns31.hichina.com (39.96.153.59)2026082616
dns31.hichina.com (120.76.107.39)2026082509
dns31.hichina.com (39.96.153.39)2026082617
dns31.hichina.com (120.76.107.59)2026082617
dns31.hichina.com (139.224.142.99)2026082509
dns31.hichina.com (47.118.199.199)2026082616
dns32.hichina.com (47.118.199.197)2026082617
dns32.hichina.com (120.76.107.37)2026082617
dns32.hichina.com (139.224.142.102)2020050713
dns32.hichina.com (139.224.142.107)2026082616
dns32.hichina.com (120.76.107.62)2026082509
dns32.hichina.com (47.118.199.221)2026082617
dns32.hichina.com (39.96.153.62)2026082617
dns32.hichina.com (2408:4009:501::40)2026082509

Checks

  • !
    Serials differ
    The nameservers serve different versions of the zone: 2020050713 on dns31.hichina.com (139.224.142.109), dns32.hichina.com (139.224.142.102); 2026082509 on dns31.hichina.com (120.76.107.39), dns31.hichina.com (139.224.142.99), dns32.hichina.com (120.76.107.62), dns32.hichina.com (2408:4009:501::40); 2026082616 on dns31.hichina.com (39.96.153.59), dns31.hichina.com (47.118.199.199), dns32.hichina.com (139.224.142.107); 2026082617 on dns31.hichina.com (39.96.153.39), dns31.hichina.com (120.76.107.59), dns32.hichina.com (47.118.199.197), dns32.hichina.com (120.76.107.37), dns32.hichina.com (47.118.199.221), dns32.hichina.com (39.96.153.62); 2026082815 on dns31.hichina.com (47.118.199.219). 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 dns31.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 2026082815 follows the YYYYMMDDnn convention (2026-08-28).

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

6 records at the apex

Found

Read from
47.118.199.219:53
TypeValueTTL
SOAdns31.hichina.com. hostmaster.hichina.com. 2026082815 3600 1200 86400 600600
NSdns31.hichina.com.86400
NSdns32.hichina.com.86400
A121.89.178.200600
MX10 mxbiz2.qq.com.600
MX5 mxbiz1.qq.com.600

Checks

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