vzan.com

Checked 22 October 2026, 11:23 UTC · via 8.8.8.8
✗Problems found
21 passed 6 warnings 1 failed 3 info

Registration

info

.com generic · eName Technology Co., Ltd. · expires 2027-04-20

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
eName Technology Co., Ltd.
Registered
20 April 2005
Last changed
11 November 2025
Expires
20 April 2027
Status
client delete prohibited, client transfer prohibited
Registry nameservers
ns3.dnsv5.com, ns4.dnsv4.com, ns4.dnsv5.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 2027-04-20 #3
    The registration is valid until 2027-04-20 (180 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client transfer prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

warn

ns3.dnsv5.com, ns4.dnsv4.com, ns4.dnsv5.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns3.dnsv5.com, ns4.dnsv4.com, ns4.dnsv5.com
NS in the zone
ns3.dnsv5.com, ns4.dnsv5.com
NameserverAddressesNetwork (AS)Glue
ns3.dnsv5.com13.37.58.163 162.62.49.74 163.177.5.52 15.160.102.38 1.12.14.18 1.12.14.17 1.12.0.18 18.134.75.163 1.12.0.17 240d:c000:3011::10AS16509 AMAZON-02 - Amazon.com, Inc., US AS132203 TENCENT-NET-AP-CN - Tencent Building, Kejizhongyi Avenue, CN AS136958 UNICOM-GuangZhou-IDC - China Unicom Guangdong IP network, CN AS16509 AMAZON-02 - Amazon.com, Inc., US AS132203 TENCENT-NET-AP-CN - Tencent Building, Kejizhongyi Avenue, CN AS45090 TENCENT-NET-AP - Shenzhen Tencent Computer Systems Company Limited, CN AS45090 TENCENT-NET-AP - Shenzhen Tencent Computer Systems Company Limited, CN AS16509 AMAZON-02 - Amazon.com, Inc., US AS132203 TENCENT-NET-AP-CN - Tencent Building, Kejizhongyi Avenue, CN AS132203 TENCENT-NET-AP-CN - Tencent Building, Kejizhongyi Avenue, CN1.12.0.17 1.12.0.18 1.12.14.17 1.12.14.18 101.227.168.52 108.136.87.44 163.177.5.52 220.196.136.52 2402:4e00:1470:2::f 35.165.107.227
ns4.dnsv4.com (parent only)117.135.128.153 1.12.0.23 43.130.172.54 101.227.168.53 220.196.136.53 49.7.107.153 111.13.203.53 163.177.5.53 1.12.0.26 2402:4e00:111:fff::dAS24400 CMNET-V4shanghai-AS-AP - Shanghai Mobile Communications Co.,Ltd., CN AS45090 TENCENT-NET-AP - Shenzhen Tencent Computer Systems Company Limited, CN AS132203 TENCENT-NET-AP-CN - Tencent Building, Kejizhongyi Avenue, CN AS4811 CHINANET-SHANGHAI-MAN - China Telecom (Group), CN AS17621 CNCGROUP-SH - China Unicom Shanghai network, CN AS23724 CHINANET-IDC-BJ-AP - IDC, China Telecommunications Corporation, CN AS9808 CHINAMOBILE-CN - China Mobile Communications Group Co., Ltd., CN AS136958 UNICOM-GuangZhou-IDC - China Unicom Guangdong IP network, CN AS45090 TENCENT-NET-AP - Shenzhen Tencent Computer Systems Company Limited, CN AS45090 TENCENT-NET-AP - Shenzhen Tencent Computer Systems Company Limited, CN1.12.0.23 1.12.0.26 101.227.168.53 111.13.203.53 117.135.128.153 163.177.5.53 220.196.136.53 2402:4e00:111:fff::d 43.130.172.54 49.7.107.153
ns4.dnsv5.com18.194.2.137 63.34.1.181 1.12.0.19 1.12.14.19 162.62.49.12 13.48.202.4 1.12.0.16 1.12.14.16 240d:c000:3011::fAS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US AS132203 TENCENT-NET-AP-CN - Tencent Building, Kejizhongyi Avenue, CN AS132203 TENCENT-NET-AP-CN - Tencent Building, Kejizhongyi Avenue, CN AS132203 TENCENT-NET-AP-CN - Tencent Building, Kejizhongyi Avenue, CN AS16509 AMAZON-02 - Amazon.com, Inc., US AS45090 TENCENT-NET-AP - Shenzhen Tencent Computer Systems Company Limited, CN AS45090 TENCENT-NET-AP - Shenzhen Tencent Computer Systems Company Limited, CN AS132203 TENCENT-NET-AP-CN - Tencent Building, Kejizhongyi Avenue, CN1.12.0.16 1.12.0.19 1.12.14.16 1.12.14.19 117.135.128.152 124.64.205.152 13.37.58.163 2402:4e00:111:fff::8 49.7.107.152

Checks

  • ✓ 3 nameservers #6
    Delegated to ns3.dnsv5.com, ns4.dnsv4.com, ns4.dnsv5.com.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: ns4.dnsv4.com. ns3.dnsv5.com, ns4.dnsv4.com, ns4.dnsv5.com report NS ns3.dnsv5.com ns4.dnsv5.com.
    #7
  • !
    Glue differs from the zone
    The addresses at the parent (glue) differ from the addresses in the zone: ns3.dnsv5.com (glue 1.12.0.17, 1.12.0.18, 1.12.14.17, 1.12.14.18, 101.227.168.52, 108.136.87.44, 163.177.5.52, 220.196.136.52, 2402:4e00:1470:2::f, 35.165.107.227, zone 13.37.58.163, 162.62.49.74, 163.177.5.52, 15.160.102.38, 1.12.14.18, 1.12.14.17, 1.12.0.18, 18.134.75.163, 1.12.0.17, 240d:c000:3011::10); ns4.dnsv5.com (glue 1.12.0.16, 1.12.0.19, 1.12.14.16, 1.12.14.19, 117.135.128.152, 124.64.205.152, 13.37.58.163, 2402:4e00:111:fff::8, 49.7.107.152, zone 18.194.2.137, 63.34.1.181, 1.12.0.19, 1.12.14.19, 162.62.49.12, 13.48.202.4, 1.12.0.16, 1.12.14.16, 240d:c000:3011::f). 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 16 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 9 autonomous systems #11
    The nameservers are spread over: AS132203 (TENCENT-NET-AP-CN - Tencent Building, Kejizhongyi Avenue, CN): 9 addresses; AS136958 (UNICOM-GuangZhou-IDC - China Unicom Guangdong IP network, CN): 2 addresses; AS16509 (AMAZON-02 - Amazon.com, Inc., US): 6 addresses; AS17621 (CNCGROUP-SH - China Unicom Shanghai 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; AS45090 (TENCENT-NET-AP - Shenzhen Tencent Computer Systems Company Limited, CN): 7 addresses; AS4811 (CHINANET-SHANGHAI-MAN - China Telecom (Group), 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

28 of 29 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns3.dnsv5.com 13.37.58.163NOERROR, 12 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns3.dnsv5.com 162.62.49.74NOERROR, 4 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns3.dnsv5.com 163.177.5.52NOERROR, 231 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns3.dnsv5.com 15.160.102.38NOERROR, 14 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns3.dnsv5.com 1.12.14.18no responsenono / no--
ns3.dnsv5.com 1.12.14.17NOERROR, 199 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns3.dnsv5.com 1.12.0.18NOERROR, 4 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns3.dnsv5.com 18.134.75.163NOERROR, 15 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns3.dnsv5.com 1.12.0.17NOERROR, 4 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns3.dnsv5.com 240d:c000:3011::10NOERROR, 97 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv4.com 117.135.128.153NOERROR, 196 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv4.com 1.12.0.23NOERROR, 4 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv4.com 43.130.172.54NOERROR, 100 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv4.com 101.227.168.53NOERROR, 173 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv4.com 220.196.136.53NOERROR, 223 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv4.com 49.7.107.153NOERROR, 137 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv4.com 111.13.203.53NOERROR, 137 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv4.com 163.177.5.53NOERROR, 157 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv4.com 1.12.0.26NOERROR, 4 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv4.com 2402:4e00:111:fff::dNOERROR, 202 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv5.com 18.194.2.137NOERROR, 4 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv5.com 63.34.1.181NOERROR, 23 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv5.com 1.12.0.19NOERROR, 4 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv5.com 1.12.14.19NOERROR, 193 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv5.com 162.62.49.12NOERROR, 3 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv5.com 13.48.202.4NOERROR, 24 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv5.com 1.12.0.16NOERROR, 4 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv5.com 1.12.14.16NOERROR, 211 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns4.dnsv5.com 240d:c000:3011::fNOERROR, 96 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01

Checks

  • ✗
    Nameservers not responding
    These addresses did not answer, so resolvers waste time on timeouts: ns3.dnsv5.com (1.12.14.18): read udp 46.225.38.91:35149->1.12.14.18:53: 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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns3.dnsv5.com: "DNSPod AUTHORITY DNS 7.3.2512.01"; ns4.dnsv4.com: "DNSPod AUTHORITY DNS 7.3.2512.01"; ns4.dnsv5.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.
  • ✓ 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 1792662603 · primary ns3.dnsv5.com

Found

Primary (MNAME)
ns3.dnsv5.com
Contact (RNAME)
enterprise3dnsadmin.dnspod.com
Serial
1792662603
Refresh / retry
3600 s / 180 s
Expire
1209600 s
Negative TTL
180 s

Serial per nameserver

NameserverSerial
ns3.dnsv5.com (13.37.58.163)1792662603
ns3.dnsv5.com (162.62.49.74)1792662603
ns3.dnsv5.com (163.177.5.52)1792662603
ns3.dnsv5.com (15.160.102.38)1792662603
ns3.dnsv5.com (1.12.14.17)1792662603
ns3.dnsv5.com (1.12.0.18)1792662603
ns3.dnsv5.com (18.134.75.163)1792662603
ns3.dnsv5.com (1.12.0.17)1792662603
ns3.dnsv5.com (240d:c000:3011::10)1792662603
ns4.dnsv4.com (117.135.128.153)1792662603
ns4.dnsv4.com (1.12.0.23)1792662603
ns4.dnsv4.com (43.130.172.54)1792662603
ns4.dnsv4.com (101.227.168.53)1792662603
ns4.dnsv4.com (220.196.136.53)1792662603
ns4.dnsv4.com (49.7.107.153)1792662603
ns4.dnsv4.com (111.13.203.53)1792662603
ns4.dnsv4.com (163.177.5.53)1792662603
ns4.dnsv4.com (1.12.0.26)1792662603
ns4.dnsv4.com (2402:4e00:111:fff::d)1792662603
ns4.dnsv5.com (18.194.2.137)1792662603
ns4.dnsv5.com (63.34.1.181)1792662603
ns4.dnsv5.com (1.12.0.19)1792662603
ns4.dnsv5.com (1.12.14.19)1792662603
ns4.dnsv5.com (162.62.49.12)1792662603
ns4.dnsv5.com (13.48.202.4)1792662603
ns4.dnsv5.com (1.12.0.16)1792662603
ns4.dnsv5.com (1.12.14.16)1792662603
ns4.dnsv5.com (240d:c000:3011::f)1792662603

Checks

  • ✓ Serial 1792662603 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    negative caching TTL (minimum) 3m is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 1h, retry 3m, expire 14d, negative TTL 3m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns3.dnsv5.com is one of the listed nameservers.
  • ✓ Contact enterprise3dnsadmin@dnspod.com #25
    The SOA RNAME enterprise3dnsadmin.dnspod.com means enterprise3dnsadmin@dnspod.com.
  • ✓ Timestamp serial #26
    The serial 1792662603 is a Unix timestamp (2026-10-22 09:50 UTC).

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

warn

8 records at the apex

Found

Read from
13.37.58.163:53
TypeValueTTL
SOAns3.dnsv5.com. enterprise3dnsadmin.dnspod.com. 1792662603 3600 180 1209600 180180
NSns3.dnsv5.com.86400
NSns4.dnsv5.com.86400
A180.188.25.65120
MX5 mx1.qiye.aliyun.com.600
MX10 mx2.qiye.aliyun.com.600
MX15 mx3.qiye.aliyun.com.600
TXT"v=spf1 include:zcsend.net include:spf.qiye.aliyun.com -all"120

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (2m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 1d; resolvers may use either.
    #32
  • ✓ 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