Domain report: 51meets.com

Registration

info

.com generic · Alibaba Cloud Computing (Beijing) Co., Ltd. · expires 2027-11-09

Found

TLD: .com (generic)
ICANN policies apply: yes
Registrar: Alibaba Cloud Computing (Beijing) Co., Ltd.
Registered: 9 November 2016
Last changed: 3 November 2025
Expires: 9 November 2027
Status: active
Registry nameservers: dns10.hichina.com, dns9.hichina.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 2027-11-09 #3

The registration is valid until 2027-11-09 (382 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

info

dns10.hichina.com, dns9.hichina.com

Found

Parent zone: com
Delegation from: a.gtld-servers.net (192.5.6.30)
NS at the parent: dns10.hichina.com, dns9.hichina.com
NS in the zone: dns10.hichina.com, dns9.hichina.com

Nameserver	Addresses	Network (AS)	Glue
dns10.hichina.com	39.96.153.41 47.118.199.201 139.224.142.111 120.76.107.41 39.96.153.51 120.76.107.51 139.224.142.121 47.118.199.211 2408:4009:501::18	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 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 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	120.76.107.41 120.76.107.51 139.224.142.111 139.224.142.121 2408:4009:501::18 39.96.153.41 39.96.153.51 47.118.199.201 47.118.199.211
dns9.hichina.com	139.224.142.122 120.76.107.42 120.76.107.52 39.96.153.52 47.118.199.202 139.224.142.112 47.118.199.212 39.96.153.42 2408:4009:501::17	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 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 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	120.76.107.42 120.76.107.52 139.224.142.112 139.224.142.122 2408:4009:501::17 39.96.153.42 39.96.153.52 47.118.199.202 47.118.199.212

Checks

i

2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns10.hichina.com, dns9.hichina.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.
i

One address family in one network

all IPv6 addresses are in 2408:4009:501::/48, while the other address family is spread over several networks.

#10
i

All nameservers in one AS

All nameserver addresses are announced by one network operator (AS37963 (ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN): 18 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.

#11
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

18 of 18 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
dns10.hichina.com 39.96.153.41	NOERROR, 204 ms, authoritative	no	yes / yes	refused	-
dns10.hichina.com 47.118.199.201	NOERROR, 204 ms, authoritative	no	yes / yes	refused	-
dns10.hichina.com 139.224.142.111	NOERROR, 200 ms, authoritative	no	yes / yes	refused	-
dns10.hichina.com 120.76.107.41	NOERROR, 200 ms, authoritative	no	yes / yes	refused	-
dns10.hichina.com 39.96.153.51	NOERROR, 150 ms, authoritative	no	yes / yes	refused	-
dns10.hichina.com 120.76.107.51	NOERROR, 203 ms, authoritative	no	yes / yes	refused	-
dns10.hichina.com 139.224.142.121	NOERROR, 167 ms, authoritative	no	yes / yes	refused	-
dns10.hichina.com 47.118.199.211	NOERROR, 210 ms, authoritative	no	yes / yes	refused	-
dns10.hichina.com 2408:4009:501::18	NOERROR, 207 ms, authoritative	no	yes / yes	refused	-
dns9.hichina.com 139.224.142.122	NOERROR, 168 ms, authoritative	no	yes / yes	refused	-
dns9.hichina.com 120.76.107.42	NOERROR, 214 ms, authoritative	no	yes / yes	refused	-
dns9.hichina.com 120.76.107.52	NOERROR, 217 ms, authoritative	no	yes / yes	refused	-
dns9.hichina.com 39.96.153.52	NOERROR, 162 ms, authoritative	no	yes / yes	refused	-
dns9.hichina.com 47.118.199.202	NOERROR, 208 ms, authoritative	no	yes / yes	refused	-
dns9.hichina.com 139.224.142.112	NOERROR, 180 ms, authoritative	no	yes / yes	refused	-
dns9.hichina.com 47.118.199.212	NOERROR, 206 ms, authoritative	no	yes / yes	refused	-
dns9.hichina.com 39.96.153.42	NOERROR, 165 ms, authoritative	no	yes / yes	refused	-
dns9.hichina.com 2408:4009:501::17	NOERROR, 193 ms, authoritative	no	yes / yes	refused	-

Checks

✓ All respond #14

All 18 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 2026082617 · primary dns9.hichina.com

Found

Primary (MNAME): dns9.hichina.com
Contact (RNAME): hostmaster.hichina.com
Serial: 2026082617
Refresh / retry: 3600 s / 1200 s
Expire: 86400 s
Negative TTL: 600 s

Serial per nameserver

Nameserver	Serial
dns10.hichina.com (39.96.153.41)	2026082617
dns10.hichina.com (47.118.199.201)	2026082815
dns10.hichina.com (139.224.142.111)	2026082709
dns10.hichina.com (120.76.107.41)	2026082617
dns10.hichina.com (39.96.153.51)	2026082616
dns10.hichina.com (120.76.107.51)	2026082616
dns10.hichina.com (139.224.142.121)	2026082709
dns10.hichina.com (47.118.199.211)	2026082616
dns10.hichina.com (2408:4009:501::18)	2026082616
dns9.hichina.com (139.224.142.122)	2026082709
dns9.hichina.com (120.76.107.42)	2026082509
dns9.hichina.com (120.76.107.52)	2026082509
dns9.hichina.com (39.96.153.52)	2026082617
dns9.hichina.com (47.118.199.202)	2026082616
dns9.hichina.com (139.224.142.112)	2026082509
dns9.hichina.com (47.118.199.212)	2026082616
dns9.hichina.com (39.96.153.42)	2026082616
dns9.hichina.com (2408:4009:501::17)	2026082616

Checks

!

Serials differ

The nameservers serve different versions of the zone: 2026082509 on dns9.hichina.com (120.76.107.42), dns9.hichina.com (120.76.107.52), dns9.hichina.com (139.224.142.112); 2026082616 on dns10.hichina.com (39.96.153.51), dns10.hichina.com (120.76.107.51), dns10.hichina.com (47.118.199.211), dns10.hichina.com (2408:4009:501::18), dns9.hichina.com (47.118.199.202), dns9.hichina.com (47.118.199.212), dns9.hichina.com (39.96.153.42), dns9.hichina.com (2408:4009:501::17); 2026082617 on dns10.hichina.com (39.96.153.41), dns10.hichina.com (120.76.107.41), dns9.hichina.com (39.96.153.52); 2026082709 on dns10.hichina.com (139.224.142.111), dns10.hichina.com (139.224.142.121), dns9.hichina.com (139.224.142.122); 2026082815 on dns10.hichina.com (47.118.199.201). 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 dns9.hichina.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 2026082617 follows the YYYYMMDDnn convention (2026-08-26).

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

4 records at the apex

Found

Read from: 39.96.153.41:53

Type	Value	TTL
SOA	dns9.hichina.com. hostmaster.hichina.com. 2026082616 3600 1200 86400 600	600
NS	dns9.hichina.com.	86400
NS	dns10.hichina.com.	86400
A	120.76.24.245	600

Checks

✓ TTLs within range #32

TTLs: A 10m, NS 1d. The NS TTL at the parent is 2d and in the zone 1d; resolvers may use either.
✓ No CNAME at the apex #33

The zone apex has no CNAME record.
✓ No wildcard #34

Names that don't exist return NXDOMAIN.
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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