Domain report: mengbeitao.com

Registration

info

.com generic · Jiangsu Bangning Science & technology Co. Ltd. · expires 2027-01-03

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.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 2027-01-03 #3

The registration is valid until 2027-01-03 (72 days).
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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.

warn

dns3.4cun.com, dns4.51dns.top

Nameserver	Addresses	Network (AS)	Glue
dns3.4cun.com (parent only)	61.172.183.74 2408:4005:3dc:af00:a6be:339e:a1a0:d2b8	AS4811 CHINANET-SHANGHAI-MAN - China Telecom (Group), CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN	240e:d9:c200:300::36 61.172.183.74
dns4.51dns.top (parent only)	219.138.102.210 2408:4005:3dc:af00:a6be:339e:a1a0:d2b8	AS136191 CHINATELECOM-HUBEI-YICHANG-IDC - YICHANG, Hubei Province, P.R.China., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN	-

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2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns3.4cun.com, dns4.51dns.top.

#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: dns3.4cun.com (glue 240e:d9:c200:300::36, 61.172.183.74, zone 61.172.183.74, 2408:4005:3dc:af00:a6be:339e:a1a0:d2b8). Update the glue at your registrar.

#8
✓ All names resolve #9

Every nameserver name has an address and is not an alias.
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One address family in one network

all IPv6 addresses are in 2408:4005:3dc::/48, while the other address family is spread over several networks.

#10
✓ 3 autonomous systems #11

The nameservers are spread over: AS136191 (CHINATELECOM-HUBEI-YICHANG-IDC - YICHANG, Hubei Province, P.R.China., CN): 1 address; AS37963 (ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN): 2 addresses; AS4811 (CHINANET-SHANGHAI-MAN - China Telecom (Group), CN): 1 address.
✓ Nameserver names under 2 TLDs #12

Nameserver names use the TLDs .com, .top.
✓ All reachable over IPv6 #13

Every nameserver has an IPv6 address.

fail

4 of 4 addresses answer authoritatively

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
dns3.4cun.com 61.172.183.74	NOERROR, 185 ms, authoritative	no	no / no	refused	dns server
dns3.4cun.com 2408:4005:3dc:af00:a6be:339e:a1a0:d2b8	NOERROR, 173 ms, authoritative	no	no / yes	refused	dns server
dns4.51dns.top 219.138.102.210	NOERROR, 213 ms, authoritative	no	no / no	refused	dns server
dns4.51dns.top 2408:4005:3dc:af00:a6be:339e:a1a0:d2b8	NOERROR, 242 ms, authoritative	no	no / yes	refused	dns server

✓ All respond #14

All 4 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.
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Identifying string disclosed

These nameservers answer version queries with a string that is not a version number: dns3.4cun.com: "dns server"; dns4.51dns.top: "dns server".

#17
✓ Zone transfers refused #18

No nameserver allows a zone transfer to the public.
✗

No DNS over TCP

DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: dns3.4cun.com (61.172.183.74): dial tcp 61.172.183.74:53: i/o timeout; dns3.4cun.com (2408:4005:3dc:af00:a6be:339e:a1a0:d2b8): read tcp [2a01:4f8:1c1c:eebf::1]:53314->[2408:4005:3dc:af00:a6be:339e:a1a0:d2b8]:53: i/o timeout; dns4.51dns.top (219.138.102.210): dial tcp 219.138.102.210:53: i/o timeout; dns4.51dns.top (2408:4005:3dc:af00:a6be:339e:a1a0:d2b8): read tcp [2a01:4f8:1c1c:eebf::1]:53328->[2408:4005:3dc:af00:a6be:339e:a1a0:d2b8]:53: i/o timeout.

#19
!

No EDNS

These nameservers don't support EDNS(0), needed for DNSSEC and answers larger than 512 bytes: dns3.4cun.com (61.172.183.74), dns4.51dns.top (219.138.102.210).

#20
✓ Public addresses #21

All nameserver addresses are publicly routable.

info

serial 1772527935 · primary dns.4cun.com

✓ Serial 1772527935 everywhere #22

All nameservers serve the same version of the zone.
✓ Timers within recommendations #23

SOA refresh 1h, retry 3m, expire 14d, negative TTL 10m.
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Hidden master

The primary nameserver dns.4cun.com is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.

#24
✓ Contact admin@mengbeitao.com #25

The SOA RNAME admin.mengbeitao.com means admin@mengbeitao.com.
✓ Timestamp serial #26

The serial 1772527935 is a Unix timestamp (2026-03-03 08:52 UTC).

info

Not signed

Lookup error: read udp 46.225.38.91:34692->61.172.183.74:53: i/o timeout

info

1 record at the apex

Type	Value	TTL
SOA	dns.4cun.com. admin.mengbeitao.com. 1772527935 3600 180 1209600 600	590