zongheng.com

Checked 22 October 2026, 11:44 UTC · via 8.8.8.8
✗Problems found
16 passed 6 warnings 3 failed 5 info

Registration

info

.com generic · Alibaba Cloud Computing Ltd. d/b/a HiChina (www.net.cn) · expires 2029-06-10

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Alibaba Cloud Computing Ltd. d/b/a HiChina (www.net.cn)
Registered
10 June 2003
Last changed
19 October 2023
Expires
10 June 2029
Status
active
Registry nameservers
vip3.alidns.com, vip4.alidns.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 2029-06-10 #3
    The registration is valid until 2029-06-10 (961 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

warn

vip3.alidns.com, vip4.alidns.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
vip3.alidns.com, vip4.alidns.com
NS in the zone
ns3.dnsv4.com, ns4.dnsv4.com, vip3.alidns.com, vip4.alidns.com
NameserverAddressesNetwork (AS)Glue
ns3.dnsv4.com (zone only)43.134.249.54 36.155.149.53 1.12.0.24 124.64.205.153 1.13.76.53 1.12.0.25 125.94.59.153 2402:4e00:1470:2::10AS132203 TENCENT-NET-AP-CN - Tencent Building, Kejizhongyi Avenue, CN AS56046 CMNET-Jiangsu-AP - China Mobile communications corporation, CN AS132203 TENCENT-NET-AP-CN - Tencent Building, Kejizhongyi Avenue, CN AS4808 CHINA169-BJ - China Unicom Beijing Province Network, CN AS45090 TENCENT-NET-AP - Shenzhen Tencent Computer Systems Company Limited, CN AS45090 TENCENT-NET-AP - Shenzhen Tencent Computer Systems Company Limited, CN AS4134 CHINANET-BACKBONE - No.31,Jin-rong Street, CN AS45090 TENCENT-NET-AP - Shenzhen Tencent Computer Systems Company Limited, CN-
ns4.dnsv4.com (zone only)1.12.0.23 220.196.136.53 163.177.5.53 111.13.203.53 43.130.172.54 1.12.0.26 49.7.107.153 101.227.168.53 117.135.128.153 2402:4e00:111:fff::dAS45090 TENCENT-NET-AP - Shenzhen Tencent Computer Systems Company Limited, CN AS140979 UNICOM-SHFT-IDC - China Unicom Shanghai FuTe IDC network, CN AS136958 UNICOM-GuangZhou-IDC - China Unicom Guangdong IP network, CN AS9808 CHINAMOBILE-CN - China Mobile Communications Group Co., Ltd., CN AS132203 TENCENT-NET-AP-CN - Tencent Building, Kejizhongyi Avenue, CN AS132203 TENCENT-NET-AP-CN - Tencent Building, Kejizhongyi Avenue, CN AS23724 CHINANET-IDC-BJ-AP - IDC, China Telecommunications Corporation, CN AS4811 CHINANET-SHANGHAI-MAN - China Telecom (Group), CN AS24400 CMNET-V4shanghai-AS-AP - Shanghai Mobile Communications Co.,Ltd., CN AS45090 TENCENT-NET-AP - Shenzhen Tencent Computer Systems Company Limited, CN-
vip3.alidns.com170.33.32.210 140.205.1.5 170.33.80.10 8.212.93.3 170.33.73.26 2408:4009:500::3AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN121.40.6.163 140.205.1.5 170.33.32.210 170.33.73.26 170.33.80.10 2408:4009:500::3 39.103.26.212 47.108.36.163 47.116.84.178 8.129.152.245 8.212.93.3
vip4.alidns.com140.205.1.6 170.33.80.11 170.33.32.211 170.33.73.27 8.212.93.4 2408:4009:500::4AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN AS134963 ASEPL-AS-AP - Alibaba Cloud (Singapore) Private Limited, SG AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN121.40.6.164 140.205.1.6 170.33.32.211 170.33.73.27 170.33.80.11 2408:4009:500::4 39.103.26.213 47.108.36.164 47.116.84.179 8.129.152.246 8.212.93.4

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: vip3.alidns.com, vip4.alidns.com.
    #6
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only in the zone: ns3.dnsv4.com, ns4.dnsv4.com. vip3.alidns.com, vip4.alidns.com report NS ns3.dnsv4.com ns4.dnsv4.com vip3.alidns.com vip4.alidns.com.
    #7
  • !
    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 170.33.32.210, 140.205.1.5, 170.33.80.10, 8.212.93.3, 170.33.73.26, 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 140.205.1.6, 170.33.80.11, 170.33.32.211, 170.33.73.27, 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.
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 18 IPv4 /24s and 3 IPv6 /48s.
  • ✓ 13 autonomous systems #11
    The nameservers are spread over: AS132203 (TENCENT-NET-AP-CN - Tencent Building, Kejizhongyi Avenue, CN): 4 addresses; AS134963 (ASEPL-AS-AP - Alibaba Cloud (Singapore) Private Limited, SG): 1 address; AS136958 (UNICOM-GuangZhou-IDC - China Unicom Guangdong IP network, CN): 1 address; AS140979 (UNICOM-SHFT-IDC - China Unicom Shanghai FuTe IDC network, CN): 1 address; AS23724 (CHINANET-IDC-BJ-AP - IDC, China Telecommunications Corporation, CN): 1 address; AS24400 (CMNET-V4shanghai-AS-AP - Shanghai Mobile Communications Co.,Ltd., CN): 1 address; AS4134 (CHINANET-BACKBONE - No.31,Jin-rong Street, CN): 1 address; AS45090 (TENCENT-NET-AP - Shenzhen Tencent Computer Systems Company Limited, CN): 5 addresses; AS45102 (ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN): 11 addresses; AS4808 (CHINA169-BJ - China Unicom Beijing Province Network, CN): 1 address; AS4811 (CHINANET-SHANGHAI-MAN - China Telecom (Group), CN): 1 address; AS56046 (CMNET-Jiangsu-AP - China Mobile communications corporation, CN): 1 address; AS9808 (CHINAMOBILE-CN - China Mobile Communications Group Co., Ltd., CN): 1 address.
  • 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

29 of 30 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns3.dnsv4.com 43.134.249.54REFUSED, 187 ms, authoritativenono / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns3.dnsv4.com 36.155.149.53REFUSED, 235 ms, authoritativenono / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns3.dnsv4.com 1.12.0.24REFUSED, 4 ms, authoritativenono / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns3.dnsv4.com 124.64.205.153REFUSED, 178 ms, authoritativenono / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns3.dnsv4.com 1.13.76.53REFUSED, 204 ms, authoritativenono / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns3.dnsv4.com 1.12.0.25REFUSED, 4 ms, authoritativenono / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns3.dnsv4.com 125.94.59.153no responsenono / no--
ns3.dnsv4.com 2402:4e00:1470:2::10REFUSED, 206 ms, authoritativenono / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv4.com 1.12.0.23REFUSED, 5 ms, authoritativenono / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv4.com 220.196.136.53REFUSED, 157 ms, authoritativenono / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv4.com 163.177.5.53REFUSED, 154 ms, authoritativenono / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv4.com 111.13.203.53REFUSED, 144 ms, authoritativenono / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv4.com 43.130.172.54REFUSED, 100 ms, authoritativenono / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv4.com 1.12.0.26REFUSED, 4 ms, authoritativenono / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv4.com 49.7.107.153REFUSED, 137 ms, authoritativenono / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv4.com 101.227.168.53REFUSED, 174 ms, authoritativenono / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv4.com 117.135.128.153REFUSED, 201 ms, authoritativenono / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv4.com 2402:4e00:111:fff::dREFUSED, 204 ms, authoritativenono / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
vip3.alidns.com 170.33.32.210NOERROR, 4 ms, authoritativenoyes / yesrefused-
vip3.alidns.com 140.205.1.5NOERROR, 4 ms, authoritativenoyes / yesrefused-
vip3.alidns.com 170.33.80.10NOERROR, 259 ms, authoritativenoyes / yesrefused-
vip3.alidns.com 8.212.93.3NOERROR, 165 ms, authoritativenoyes / yesrefused-
vip3.alidns.com 170.33.73.26NOERROR, 158 ms, authoritativenoyes / yesrefused-
vip3.alidns.com 2408:4009:500::3NOERROR, 5 ms, authoritativenoyes / yesrefused-
vip4.alidns.com 140.205.1.6NOERROR, 4 ms, authoritativenoyes / yesrefused-
vip4.alidns.com 170.33.80.11NOERROR, 251 ms, authoritativenoyes / yesrefused-
vip4.alidns.com 170.33.32.211NOERROR, 4 ms, authoritativenoyes / yesrefused-
vip4.alidns.com 170.33.73.27NOERROR, 155 ms, authoritativenoyes / yesrefused-
vip4.alidns.com 8.212.93.4NOERROR, 234 ms, authoritativenoyes / yesrefused-
vip4.alidns.com 2408:4009:500::4NOERROR, 4 ms, authoritativenoyes / yesrefused-

Checks

  • ✗
    Nameservers not responding
    These addresses did not answer, so resolvers waste time on timeouts: ns3.dnsv4.com (125.94.59.153): read udp 46.225.38.91:47919->125.94.59.153:53: i/o timeout.
    #14
  • ✗
    Lame delegation
    These nameservers don't answer authoritatively for the zone, so resolvers ignore them: ns3.dnsv4.com (43.134.249.54): REFUSED, authoritative=true; ns3.dnsv4.com (36.155.149.53): REFUSED, authoritative=true; ns3.dnsv4.com (1.12.0.24): REFUSED, authoritative=true; ns3.dnsv4.com (124.64.205.153): REFUSED, authoritative=true; ns3.dnsv4.com (1.13.76.53): REFUSED, authoritative=true; ns3.dnsv4.com (1.12.0.25): REFUSED, authoritative=true; ns3.dnsv4.com (2402:4e00:1470:2::10): REFUSED, authoritative=true; ns4.dnsv4.com (1.12.0.23): REFUSED, authoritative=true; ns4.dnsv4.com (220.196.136.53): REFUSED, authoritative=true; ns4.dnsv4.com (163.177.5.53): REFUSED, authoritative=true; ns4.dnsv4.com (111.13.203.53): REFUSED, authoritative=true; ns4.dnsv4.com (43.130.172.54): REFUSED, authoritative=true; ns4.dnsv4.com (1.12.0.26): REFUSED, authoritative=true; ns4.dnsv4.com (49.7.107.153): REFUSED, authoritative=true; ns4.dnsv4.com (101.227.168.53): REFUSED, authoritative=true; ns4.dnsv4.com (117.135.128.153): REFUSED, authoritative=true; ns4.dnsv4.com (2402:4e00:111:fff::d): REFUSED, authoritative=true.
    #15
  • ✓ No recursion #16
    The nameservers do not answer recursive queries for other domains.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns3.dnsv4.com: "DNSPod AUTHORITY DNS 7.3.2512.01"; ns4.dnsv4.com: "DNSPod AUTHORITY DNS 7.3.2512.01". Hide or replace the version string.
    #17
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✗
    No DNS over TCP
    DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: ns3.dnsv4.com (43.134.249.54): ; ns3.dnsv4.com (36.155.149.53): ; ns3.dnsv4.com (1.12.0.24): ; ns3.dnsv4.com (124.64.205.153): ; ns3.dnsv4.com (1.13.76.53): ; ns3.dnsv4.com (1.12.0.25): ; ns3.dnsv4.com (2402:4e00:1470:2::10): ; ns4.dnsv4.com (1.12.0.23): ; ns4.dnsv4.com (220.196.136.53): ; ns4.dnsv4.com (163.177.5.53): ; ns4.dnsv4.com (111.13.203.53): ; ns4.dnsv4.com (43.130.172.54): ; ns4.dnsv4.com (1.12.0.26): ; ns4.dnsv4.com (49.7.107.153): ; ns4.dnsv4.com (101.227.168.53): ; ns4.dnsv4.com (117.135.128.153): ; ns4.dnsv4.com (2402:4e00:111:fff::d): .
    #19
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

warn

serial 2026081810 · primary vip3.alidns.com

Found

Primary (MNAME)
vip3.alidns.com
Contact (RNAME)
hostmaster.hichina.com
Serial
2026081810
Refresh / retry
3600 s / 1200 s
Expire
86400 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
vip3.alidns.com (170.33.32.210)2026081810
vip3.alidns.com (140.205.1.5)2026082415
vip3.alidns.com (170.33.80.10)2026081716
vip3.alidns.com (8.212.93.3)2026081810
vip3.alidns.com (170.33.73.26)2023101216
vip3.alidns.com (2408:4009:500::3)2023101216
vip4.alidns.com (140.205.1.6)2023101216
vip4.alidns.com (170.33.80.11)2026081716
vip4.alidns.com (170.33.32.211)2026081810
vip4.alidns.com (170.33.73.27)2023101216
vip4.alidns.com (8.212.93.4)2026081316
vip4.alidns.com (2408:4009:500::4)2026081810

Checks

  • !
    Serials differ
    The nameservers serve different versions of the zone: 2023101216 on vip3.alidns.com (170.33.73.26), vip3.alidns.com (2408:4009:500::3), vip4.alidns.com (140.205.1.6), vip4.alidns.com (170.33.73.27); 2026081316 on vip4.alidns.com (8.212.93.4); 2026081716 on vip3.alidns.com (170.33.80.10), vip4.alidns.com (170.33.80.11); 2026081810 on vip3.alidns.com (170.33.32.210), vip3.alidns.com (8.212.93.3), vip4.alidns.com (170.33.32.211), vip4.alidns.com (2408:4009:500::4); 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
    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 vip3.alidns.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 2026081810 follows the YYYYMMDDnn convention (2026-08-18).

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

0 records at the apex

Found

Read from
43.134.249.54:53

Checks

  • ✓ 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