qianwen.com

Checked 22 October 2026, 10:23 UTC · via 8.8.8.8
✗Problems found
24 passed 3 warnings 1 failed 3 info

Registration

info

.com generic · Alibaba Cloud Computing Ltd. d/b/a HiChina (www.net.cn) · expires 2028-10-16

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Alibaba Cloud Computing Ltd. d/b/a HiChina (www.net.cn)
Registered
7 September 2004
Last changed
22 September 2026
Expires
16 October 2028
Status
client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
ns1.alibabadns.cn, ns1.alibabadns.com, ns2.alibabadns.cn, ns2.alibabadns.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 2028-10-16 #3
    The registration is valid until 2028-10-16 (724 days).
  • ✓ Transfer locked #4
    Registry status: client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

warn

ns1.alibabadns.cn, ns1.alibabadns.com, ns2.alibabadns.cn, ns2.alibabadns.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.alibabadns.cn, ns1.alibabadns.com, ns2.alibabadns.cn, ns2.alibabadns.com
NS in the zone
ns1.alibabadns.com, ns2.alibabadns.com
NameserverAddressesNetwork (AS)Glue
ns1.alibabadns.cn (parent only)140.205.103.192 106.11.35.19 47.88.74.38 47.241.207.18 106.11.41.157 140.205.122.66 2401:b180:4100::1AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN-
ns1.alibabadns.com106.11.35.19 47.88.74.38 140.205.103.192 47.241.207.18 140.205.122.66 106.11.41.157 2401:b180:4100::1AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN106.11.35.19 106.11.41.157 140.205.103.192 140.205.122.66 2401:b180:4100::1 47.241.207.18 47.88.74.38
ns2.alibabadns.cn (parent only)47.88.74.36 47.241.207.16 140.205.122.77 140.205.103.194 106.11.35.18 106.11.41.158 2401:b180:4100::2AS45102 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 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 AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN-
ns2.alibabadns.com140.205.122.77 47.241.207.16 140.205.103.194 106.11.41.158 47.88.74.36 106.11.35.18 2401:b180:4100::2AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN106.11.35.18 106.11.41.158 140.205.103.194 140.205.122.77 2401:b180:4100::2 47.241.207.16 47.88.74.36

Checks

  • ✓ 4 nameservers #6
    Delegated to ns1.alibabadns.cn, ns1.alibabadns.com, ns2.alibabadns.cn, ns2.alibabadns.com.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: ns1.alibabadns.cn, ns2.alibabadns.cn. ns1.alibabadns.cn, ns1.alibabadns.com, ns2.alibabadns.cn, ns2.alibabadns.com report NS ns1.alibabadns.com ns2.alibabadns.com.
    #7
  • ✓ 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 2401:b180:4100::/48, while the other address family is spread over several networks.
    #10
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS37963 (ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN): 14 addresses; AS45102 (ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN): 14 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .cn, .com.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

28 of 28 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.alibabadns.cn 140.205.103.192NOERROR, 205 ms, authoritativenoyes / yesrefused-
ns1.alibabadns.cn 106.11.35.19NOERROR, 162 ms, authoritativenoyes / yesrefused-
ns1.alibabadns.cn 47.88.74.38NOERROR, 159 ms, authoritativenoyes / yesrefused-
ns1.alibabadns.cn 47.241.207.18NOERROR, 172 ms, authoritativenoyes / yesrefused-
ns1.alibabadns.cn 106.11.41.157NOERROR, 142 ms, authoritativenoyes / yesrefused-
ns1.alibabadns.cn 140.205.122.66NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns1.alibabadns.cn 2401:b180:4100::1NOERROR, 205 ms, authoritativenoyes / yesrefused-
ns1.alibabadns.com 106.11.35.19NOERROR, 173 ms, authoritativenoyes / yesrefused-
ns1.alibabadns.com 47.88.74.38NOERROR, 159 ms, authoritativenoyes / yesrefused-
ns1.alibabadns.com 140.205.103.192NOERROR, 217 ms, authoritativenoyes / yesrefused-
ns1.alibabadns.com 47.241.207.18NOERROR, 174 ms, authoritativenoyes / yesrefused-
ns1.alibabadns.com 140.205.122.66NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns1.alibabadns.com 106.11.41.157NOERROR, 142 ms, authoritativenoyes / yesrefused-
ns1.alibabadns.com 2401:b180:4100::1NOERROR, 206 ms, authoritativenoyes / yesrefused-
ns2.alibabadns.cn 47.88.74.36NOERROR, 158 ms, authoritativenoyes / yesrefused-
ns2.alibabadns.cn 47.241.207.16NOERROR, 179 ms, authoritativenoyes / yesrefused-
ns2.alibabadns.cn 140.205.122.77NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns2.alibabadns.cn 140.205.103.194NOERROR, 185 ms, authoritativenoyes / yesrefused-
ns2.alibabadns.cn 106.11.35.18NOERROR, 159 ms, authoritativenoyes / yesrefused-
ns2.alibabadns.cn 106.11.41.158NOERROR, 154 ms, authoritativenoyes / yesrefused-
ns2.alibabadns.cn 2401:b180:4100::2NOERROR, 216 ms, authoritativenoyes / yesrefused-
ns2.alibabadns.com 140.205.122.77NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns2.alibabadns.com 47.241.207.16NOERROR, 172 ms, authoritativenoyes / yesrefused-
ns2.alibabadns.com 140.205.103.194NOERROR, 207 ms, authoritativenoyes / yesrefused-
ns2.alibabadns.com 106.11.41.158NOERROR, 164 ms, authoritativenoyes / yesrefused-
ns2.alibabadns.com 47.88.74.36NOERROR, 161 ms, authoritativenoyes / yesrefused-
ns2.alibabadns.com 106.11.35.18NOERROR, 150 ms, authoritativenoyes / yesrefused-
ns2.alibabadns.com 2401:b180:4100::2NOERROR, 219 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 28 nameserver addresses answered.
  • ✓ 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 2025111222 · primary ns1.alibabadns.com

Found

Primary (MNAME)
ns1.alibabadns.com
Contact (RNAME)
hostmaster.alibabadns.com
Serial
2025111222
Refresh / retry
3600 s / 1200 s
Expire
86400 s
Negative TTL
360 s

Serial per nameserver

NameserverSerial
ns1.alibabadns.cn (140.205.103.192)2025111222
ns1.alibabadns.cn (106.11.35.19)2025111222
ns1.alibabadns.cn (47.88.74.38)2025111222
ns1.alibabadns.cn (47.241.207.18)2025111222
ns1.alibabadns.cn (106.11.41.157)2025111222
ns1.alibabadns.cn (140.205.122.66)2025111222
ns1.alibabadns.cn (2401:b180:4100::1)2025111222
ns1.alibabadns.com (106.11.35.19)2025111222
ns1.alibabadns.com (47.88.74.38)2025111222
ns1.alibabadns.com (140.205.103.192)2025111222
ns1.alibabadns.com (47.241.207.18)2025111222
ns1.alibabadns.com (140.205.122.66)2025111222
ns1.alibabadns.com (106.11.41.157)2025111222
ns1.alibabadns.com (2401:b180:4100::1)2025111222
ns2.alibabadns.cn (47.88.74.36)2025111222
ns2.alibabadns.cn (47.241.207.16)2025111222
ns2.alibabadns.cn (140.205.122.77)2025111222
ns2.alibabadns.cn (140.205.103.194)2025111222
ns2.alibabadns.cn (106.11.35.18)2025111222
ns2.alibabadns.cn (106.11.41.158)2025111222
ns2.alibabadns.cn (2401:b180:4100::2)2025111222
ns2.alibabadns.com (140.205.122.77)2025111222
ns2.alibabadns.com (47.241.207.16)2025111222
ns2.alibabadns.com (140.205.103.194)2025111222
ns2.alibabadns.com (106.11.41.158)2025111222
ns2.alibabadns.com (47.88.74.36)2025111222
ns2.alibabadns.com (106.11.35.18)2025111222
ns2.alibabadns.com (2401:b180:4100::2)2025111222

Checks

  • ✓ Serial 2025111222 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    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 6m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.alibabadns.com is one of the listed nameservers.
  • ✓ Contact hostmaster@alibabadns.com #25
    The SOA RNAME hostmaster.alibabadns.com means hostmaster@alibabadns.com.
  • ✓ Date-based serial #26
    The serial 2025111222 follows the YYYYMMDDnn convention (2025-11-12).

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

fail

3 records at the apex

Found

Read from
140.205.103.192:53
TypeValueTTL
SOAns1.alibabadns.com. hostmaster.alibabadns.com. 2025111222 3600 1200 86400 360600
NSns2.alibabadns.com.86400
NSns1.alibabadns.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.
  • ✗
    CNAME at the apex
    The zone apex is a CNAME to beijing.tfe.alibaba-clould.alibabacorp.com. A CNAME can't coexist with the SOA and NS records (RFC 1034); use your provider's ALIAS/flattening feature instead.
    #33
  • ✓ 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