tosunk.com

Checked 22 October 2026, 11:11 UTC · via 8.8.8.8
✗Problems found
21 passed 3 warnings 1 failed 6 info

Registration

info

.com generic · Alibaba Cloud Computing (Beijing) Co., Ltd. · expires 2026-12-22

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Alibaba Cloud Computing (Beijing) Co., Ltd.
Registered
22 December 2014
Last changed
24 November 2025
Expires
22 December 2026
Status
client transfer prohibited
Registry nameservers
dns10.hichina.com, dns9.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 2026-12-22 #3
    The registration is valid until 2026-12-22 (60 days).
  • ✓ Transfer locked #4
    Registry status: client transfer prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

dns10.hichina.com, dns9.hichina.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
dns10.hichina.com, dns9.hichina.com
NS in the zone
dns10.hichina.com, dns9.hichina.com
NameserverAddressesNetwork (AS)Glue
dns10.hichina.com39.96.153.41 139.224.142.121 120.76.107.41 39.96.153.51 120.76.107.51 47.118.199.211 139.224.142.111 47.118.199.201 2408:4009:501::18AS37963 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., CN120.76.107.41 120.76.107.51 139.224.142.111 139.224.142.121 2408:4009:501::18 39.96.153.41 39.96.153.51 47.118.199.201 47.118.199.211
dns9.hichina.com47.118.199.202 47.118.199.212 39.96.153.52 139.224.142.112 120.76.107.42 120.76.107.52 139.224.142.122 39.96.153.42 2408:4009:501::17AS37963 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., CN120.76.107.42 120.76.107.52 139.224.142.112 139.224.142.122 2408:4009:501::17 39.96.153.42 39.96.153.52 47.118.199.202 47.118.199.212

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns10.hichina.com, dns9.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
dns10.hichina.com 39.96.153.41NOERROR, 142 ms, authoritativenoyes / yesrefused-
dns10.hichina.com 139.224.142.121NOERROR, 176 ms, authoritativenoyes / yesrefused-
dns10.hichina.com 120.76.107.41NOERROR, 201 ms, authoritativenoyes / yesrefused-
dns10.hichina.com 39.96.153.51NOERROR, 160 ms, authoritativenoyes / yesrefused-
dns10.hichina.com 120.76.107.51NOERROR, 201 ms, authoritativenoyes / yesrefused-
dns10.hichina.com 47.118.199.211NOERROR, 196 ms, authoritativenoyes / yesrefused-
dns10.hichina.com 139.224.142.111NOERROR, 188 ms, authoritativenoyes / yesrefused-
dns10.hichina.com 47.118.199.201NOERROR, 209 ms, authoritativenoyes / yesrefused-
dns10.hichina.com 2408:4009:501::18no responsenono / no--
dns9.hichina.com 47.118.199.202NOERROR, 236 ms, authoritativenoyes / yesrefused-
dns9.hichina.com 47.118.199.212NOERROR, 217 ms, authoritativenoyes / yesrefused-
dns9.hichina.com 39.96.153.52NOERROR, 173 ms, authoritativenoyes / yesrefused-
dns9.hichina.com 139.224.142.112no responsenono / no--
dns9.hichina.com 120.76.107.42NOERROR, 207 ms, authoritativenoyes / yesrefused-
dns9.hichina.com 120.76.107.52NOERROR, 209 ms, authoritativenoyes / yesrefused-
dns9.hichina.com 139.224.142.122NOERROR, 202 ms, authoritativenoyes / yesrefused-
dns9.hichina.com 39.96.153.42NOERROR, 159 ms, authoritativenoyes / yesrefused-
dns9.hichina.com 2408:4009:501::17NOERROR, 203 ms, authoritativenoyes / yesrefused-

Checks

  • ✗
    Nameservers not responding
    These addresses did not answer, so resolvers waste time on timeouts: dns10.hichina.com (2408:4009:501::18): read udp [2a01:4f8:1c1c:eebf::1]:42593->[2408:4009:501::18]:53: i/o timeout; dns9.hichina.com (139.224.142.112): read udp 46.225.38.91:47199->139.224.142.112:53: 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 2026082617 · primary dns9.hichina.com

Found

Primary (MNAME)
dns9.hichina.com
Contact (RNAME)
hostmaster.hichina.com
Serial
2026082617
Refresh / retry
3600 s / 1200 s
Expire
86400 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
dns10.hichina.com (39.96.153.41)2026082617
dns10.hichina.com (139.224.142.121)2026082616
dns10.hichina.com (120.76.107.41)2026082616
dns10.hichina.com (39.96.153.51)2026082617
dns10.hichina.com (120.76.107.51)2026081813
dns10.hichina.com (47.118.199.211)2026082815
dns10.hichina.com (139.224.142.111)2026082709
dns10.hichina.com (47.118.199.201)2026082617
dns9.hichina.com (47.118.199.202)2026082616
dns9.hichina.com (47.118.199.212)2026082815
dns9.hichina.com (39.96.153.52)2026082617
dns9.hichina.com (120.76.107.42)2026082616
dns9.hichina.com (120.76.107.52)2026082616
dns9.hichina.com (139.224.142.122)2014122217
dns9.hichina.com (39.96.153.42)2026082616
dns9.hichina.com (2408:4009:501::17)2026081813

Checks

  • !
    Serials differ
    The nameservers serve different versions of the zone: 2014122217 on dns9.hichina.com (139.224.142.122); 2026081813 on dns10.hichina.com (120.76.107.51), dns9.hichina.com (2408:4009:501::17); 2026082616 on dns10.hichina.com (139.224.142.121), dns10.hichina.com (120.76.107.41), dns9.hichina.com (47.118.199.202), dns9.hichina.com (120.76.107.42), dns9.hichina.com (120.76.107.52), dns9.hichina.com (39.96.153.42); 2026082617 on dns10.hichina.com (39.96.153.41), dns10.hichina.com (39.96.153.51), dns10.hichina.com (47.118.199.201), dns9.hichina.com (39.96.153.52); 2026082709 on dns10.hichina.com (139.224.142.111); 2026082815 on dns10.hichina.com (47.118.199.211), dns9.hichina.com (47.118.199.212). 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 dns9.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 2026082617 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

3 records at the apex

Found

Read from
39.96.153.41:53
TypeValueTTL
SOAdns9.hichina.com. hostmaster.hichina.com. 2026082616 3600 1200 86400 600600
NSdns10.hichina.com.86400
NSdns9.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