zibll.com

Checked 22 October 2026, 11:43 UTC · via 8.8.8.8
✗Problems found
20 passed 4 warnings 1 failed 6 info

Registration

info

.com generic · Alibaba Cloud Computing (Beijing) Co., Ltd. · expires 2030-02-02

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Alibaba Cloud Computing (Beijing) Co., Ltd.
Registered
2 February 2020
Last changed
6 July 2026
Expires
2 February 2030
Status
active
Registry nameservers
vip1.alidns.com, vip2.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 2030-02-02 #3
    The registration is valid until 2030-02-02 (1198 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

vip1.alidns.com, vip2.alidns.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
vip1.alidns.com, vip2.alidns.com
NS in the zone
vip1.alidns.com, vip2.alidns.com
NameserverAddressesNetwork (AS)Glue
vip1.alidns.com170.33.73.24 170.33.32.208 140.205.1.1 8.212.93.1 170.33.80.8 2408:4009:500::1AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN AS134963 ASEPL-AS-AP - Alibaba Cloud (Singapore) Private Limited, SG 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 AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN121.40.6.161 140.205.1.1 170.33.32.208 170.33.73.24 170.33.80.8 2408:4009:500::1 39.103.26.210 47.116.84.176 8.129.152.243 8.212.93.1
vip2.alidns.com170.33.32.209 170.33.73.25 8.212.93.2 170.33.80.9 140.205.1.2 2408:4009:500::2AS134963 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., CN AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN121.40.6.162 140.205.1.2 170.33.32.209 170.33.73.25 170.33.80.9 2408:4009:500::2 39.103.26.211 47.116.84.177 8.129.152.244 8.212.93.2

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: vip1.alidns.com, vip2.alidns.com.
    #6
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • !
    Glue differs from the zone
    The addresses at the parent (glue) differ from the addresses in the zone: vip1.alidns.com (glue 121.40.6.161, 140.205.1.1, 170.33.32.208, 170.33.73.24, 170.33.80.8, 2408:4009:500::1, 39.103.26.210, 47.116.84.176, 8.129.152.243, 8.212.93.1, zone 170.33.73.24, 170.33.32.208, 140.205.1.1, 8.212.93.1, 170.33.80.8, 2408:4009:500::1); vip2.alidns.com (glue 121.40.6.162, 140.205.1.2, 170.33.32.209, 170.33.73.25, 170.33.80.9, 2408:4009:500::2, 39.103.26.211, 47.116.84.177, 8.129.152.244, 8.212.93.2, zone 170.33.32.209, 170.33.73.25, 8.212.93.2, 170.33.80.9, 140.205.1.2, 2408:4009:500::2). Update the glue at your registrar.
    #8
  • ✓ 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 2408:4009:500::/48, while the other address family is spread over several networks.
    #10
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS134963 (ASEPL-AS-AP - Alibaba Cloud (Singapore) Private Limited, SG): 2 addresses; AS37963 (ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN): 1 address; AS45102 (ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN): 9 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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
vip1.alidns.com 170.33.73.24NOERROR, 154 ms, authoritativenoyes / yesrefused-
vip1.alidns.com 170.33.32.208NOERROR, 4 ms, authoritativenoyes / yesrefused-
vip1.alidns.com 140.205.1.1NOERROR, 5 ms, authoritativenoyes / yesrefused-
vip1.alidns.com 8.212.93.1NOERROR, 170 ms, authoritativenoyes / yesrefused-
vip1.alidns.com 170.33.80.8NOERROR, 250 ms, authoritativenoyes / yesrefused-
vip1.alidns.com 2408:4009:500::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
vip2.alidns.com 170.33.32.209NOERROR, 4 ms, authoritativenoyes / yesrefused-
vip2.alidns.com 170.33.73.25NOERROR, 155 ms, authoritativenoyes / yesrefused-
vip2.alidns.com 8.212.93.2NOERROR, 241 ms, authoritativenoyes / yesrefused-
vip2.alidns.com 170.33.80.9NOERROR, 261 ms, authoritativenoyes / yesrefused-
vip2.alidns.com 140.205.1.2NOERROR, 4 ms, authoritativenoyes / yesrefused-
vip2.alidns.com 2408:4009:500::2NOERROR, 4 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 12 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 2026081716 · primary vip1.alidns.com

Found

Primary (MNAME)
vip1.alidns.com
Contact (RNAME)
hostmaster.hichina.com
Serial
2026081716
Refresh / retry
3600 s / 1200 s
Expire
86400 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
vip1.alidns.com (170.33.73.24)2026081716
vip1.alidns.com (170.33.32.208)2026081716
vip1.alidns.com (140.205.1.1)2026081810
vip1.alidns.com (8.212.93.1)2020020212
vip1.alidns.com (170.33.80.8)2026082516
vip1.alidns.com (2408:4009:500::1)2020020212
vip2.alidns.com (170.33.32.209)2026082516
vip2.alidns.com (170.33.73.25)2020020212
vip2.alidns.com (8.212.93.2)2020020212
vip2.alidns.com (170.33.80.9)2026081716
vip2.alidns.com (140.205.1.2)2020020212
vip2.alidns.com (2408:4009:500::2)2026082415

Checks

  • !
    Serials differ
    The nameservers serve different versions of the zone: 2020020212 on vip1.alidns.com (8.212.93.1), vip1.alidns.com (2408:4009:500::1), vip2.alidns.com (170.33.73.25), vip2.alidns.com (8.212.93.2), vip2.alidns.com (140.205.1.2); 2026081716 on vip1.alidns.com (170.33.73.24), vip1.alidns.com (170.33.32.208), vip2.alidns.com (170.33.80.9); 2026081810 on vip1.alidns.com (140.205.1.1); 2026082415 on vip2.alidns.com (2408:4009:500::2); 2026082516 on vip1.alidns.com (170.33.80.8), vip2.alidns.com (170.33.32.209). 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 vip1.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 2026081716 follows the YYYYMMDDnn convention (2026-08-17).

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
170.33.73.24:53
TypeValueTTL
SOAvip1.alidns.com. hostmaster.hichina.com. 2026082516 3600 1200 86400 600600
NSvip1.alidns.com.86400
NSvip2.alidns.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 zibll.com.eo.dnse2.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