xueqiu.com

Checked 22 October 2026, 11:36 UTC · via 8.8.8.8
✗Problems found
20 passed 5 warnings 1 failed 5 info

Registration

info

.com generic · Alibaba Cloud Computing (Beijing) Co., Ltd. · expires 2031-05-08

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Alibaba Cloud Computing (Beijing) Co., Ltd.
Registered
8 May 2001
Last changed
9 April 2026
Expires
8 May 2031
Status
active
Registry nameservers
ns1.dnsv4.com, ns2.dnsv4.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 2031-05-08 #3
    The registration is valid until 2031-05-08 (1659 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

ns1.dnsv4.com, ns2.dnsv4.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.dnsv4.com, ns2.dnsv4.com
NS in the zone
ns1.dnsv4.com, ns2.dnsv4.com
NameserverAddressesNetwork (AS)Glue
ns1.dnsv4.com1.12.0.24 125.94.59.153 117.89.178.53 1.13.76.53 43.134.249.54 36.155.149.53 1.12.0.25AS132203 TENCENT-NET-AP-CN - Tencent Building, Kejizhongyi Avenue, CN AS4134 CHINANET-BACKBONE - No.31,Jin-rong Street, CN AS134756 ChinaNet-NANJING-JISHAN-IDC - CHINANET Nanjing Jishan IDC network, CN AS45090 TENCENT-NET-AP - Shenzhen Tencent Computer Systems Company Limited, CN AS132203 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, CN1.12.0.24 1.12.0.25 1.13.76.53 117.89.178.53 125.94.59.153 36.155.149.53 43.134.249.54
ns2.dnsv4.com101.227.168.53 43.130.172.54 117.135.128.153 220.196.136.53 163.177.5.53 1.12.0.23 111.13.203.53 1.12.0.26AS4811 CHINANET-SHANGHAI-MAN - China Telecom (Group), CN AS132203 TENCENT-NET-AP-CN - Tencent Building, Kejizhongyi Avenue, CN AS9808 CHINAMOBILE-CN - China Mobile Communications Group Co., Ltd., CN AS140979 UNICOM-SHFT-IDC - China Unicom Shanghai FuTe IDC network, CN AS136958 UNICOM-GuangZhou-IDC - China Unicom Guangdong IP network, CN AS132203 TENCENT-NET-AP-CN - Tencent Building, Kejizhongyi Avenue, CN AS9808 CHINAMOBILE-CN - China Mobile Communications Group Co., Ltd., 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 43.130.172.54

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.dnsv4.com, ns2.dnsv4.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.
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 12 IPv4 /24s and 0 IPv6 /48s.
  • ✓ 9 autonomous systems #11
    The nameservers are spread over: AS132203 (TENCENT-NET-AP-CN - Tencent Building, Kejizhongyi Avenue, CN): 5 addresses; AS134756 (ChinaNet-NANJING-JISHAN-IDC - CHINANET Nanjing Jishan IDC network, CN): 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; AS4134 (CHINANET-BACKBONE - No.31,Jin-rong Street, CN): 1 address; AS45090 (TENCENT-NET-AP - Shenzhen Tencent Computer Systems Company Limited, CN): 2 addresses; 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): 2 addresses.
  • 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

fail

14 of 15 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.dnsv4.com 1.12.0.24NOERROR, 6 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns1.dnsv4.com 125.94.59.153NOERROR, 217 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns1.dnsv4.com 117.89.178.53NOERROR, 170 ms, authoritativenoyes / yesrefused-
ns1.dnsv4.com 1.13.76.53NOERROR, 203 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns1.dnsv4.com 43.134.249.54NOERROR, 163 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns1.dnsv4.com 36.155.149.53NOERROR, 258 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns1.dnsv4.com 1.12.0.25NOERROR, 6 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns2.dnsv4.com 101.227.168.53no responsenono / no--
ns2.dnsv4.com 43.130.172.54NOERROR, 100 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns2.dnsv4.com 117.135.128.153NOERROR, 189 ms, authoritativenoyes / yesrefused-
ns2.dnsv4.com 220.196.136.53NOERROR, 207 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns2.dnsv4.com 163.177.5.53NOERROR, 232 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns2.dnsv4.com 1.12.0.23NOERROR, 5 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns2.dnsv4.com 111.13.203.53NOERROR, 135 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01
ns2.dnsv4.com 1.12.0.26NOERROR, 5 ms, authoritativenoyes / yesrefusedDNSPod AUTHORITY DNS 7.3.2512.01

Checks

  • ✗
    Nameservers not responding
    These addresses did not answer, so resolvers waste time on timeouts: ns2.dnsv4.com (101.227.168.53): read udp 46.225.38.91:50254->101.227.168.53:53: 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: ns1.dnsv4.com: "DNSPod AUTHORITY DNS 7.3.2512.01"; ns2.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.
  • ✓ 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 1792509572 · primary ns1.dnsv4.com

Found

Primary (MNAME)
ns1.dnsv4.com
Contact (RNAME)
enterprise2dnsadmin.dnspod.com
Serial
1792509572
Refresh / retry
3600 s / 180 s
Expire
1209600 s
Negative TTL
180 s

Serial per nameserver

NameserverSerial
ns1.dnsv4.com (1.12.0.24)1792509572
ns1.dnsv4.com (125.94.59.153)1792509572
ns1.dnsv4.com (117.89.178.53)1792509572
ns1.dnsv4.com (1.13.76.53)1792509572
ns1.dnsv4.com (43.134.249.54)1792509572
ns1.dnsv4.com (36.155.149.53)1792509572
ns1.dnsv4.com (1.12.0.25)1792509572
ns2.dnsv4.com (43.130.172.54)1792509572
ns2.dnsv4.com (117.135.128.153)1792509572
ns2.dnsv4.com (220.196.136.53)1792509572
ns2.dnsv4.com (163.177.5.53)1792509572
ns2.dnsv4.com (1.12.0.23)1792509572
ns2.dnsv4.com (111.13.203.53)1792509572
ns2.dnsv4.com (1.12.0.26)1792509572

Checks

  • ✓ Serial 1792509572 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 ns1.dnsv4.com is one of the listed nameservers.
  • ✓ Contact enterprise2dnsadmin@dnspod.com #25
    The SOA RNAME enterprise2dnsadmin.dnspod.com means enterprise2dnsadmin@dnspod.com.
  • ✓ Timestamp serial #26
    The serial 1792509572 is a Unix timestamp (2026-10-20 15:19 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

11 records at the apex

Found

Read from
1.12.0.24:53
TypeValueTTL
SOAns1.dnsv4.com. enterprise2dnsadmin.dnspod.com. 1792509572 3600 180 1209600 180180
NSns1.dnsv4.com.86400
NSns2.dnsv4.com.86400
A47.90.115.13230
MX1 mx1.feishu.cn.60
MX5 mx2.feishu.cn.60
MX10 mx3.feishu.cn.60
TXT"verification-code-site-App_feishu=ProfuvZuL3EeKxZbXo6t"120
TXT"google-site-verification=6e-e2PAOni-FrjDpv8WCY_VqKqkq6Vuk4sHUm93Bl2A"120
TXT"google-site-verification=naQ84vd5sJcoU6_ux91QDT67c99mz5al5K1weBZ0RRc"120
TXT"v=spf1 +include:spf.mail.qq.com +include:_netblocks.m.feishu.cn ~all"120

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (30s), MX (1m). 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