`zk21.com`

DNSSEC	⚠️ Not signed
NS	`ns1.alidns.com` ⭐
		A	2408:4009:501::1^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.45^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.55^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.205^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.215^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.45^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.55^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.115^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	139.224.142.125^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
NS	`ns2.alidns.com`
		A	2408:4009:501::2^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.46^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.56^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.206^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.216^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.46^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.56^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.116^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	139.224.142.126^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
SOA	`ns1.alidns.com`hostmaster@hichina.com 2026-06-04 #13

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1783943437

WOT: UNKNOWN (61/100)

Subdomains

www.zk21.com

Same first word

zk21.com

Similar names

21kz.com

z12k.xyz

k12z.com

kz21.com

zk12.org

zk12.com

k1z2.com

DNS History

3 records (2 active, 1 former)

○NS(root)2015-07-13 → 2017-04-09 · 4 obs

● 2015-07-13 21:45:12
● 2017-04-09 04:29:20
○ 2026-03-26 01:58:38
○ 2026-07-13 12:16:56

●NSns1.alidns.com2026-03-26 → 2026-07-13 · 3 obs

○ 2017-04-09 04:29:20
● 2026-03-26 01:58:38
● 2026-07-13 12:16:56

●NSns2.alidns.com2026-03-26 → 2026-07-13 · 3 obs

○ 2017-04-09 04:29:20
● 2026-03-26 01:58:38
● 2026-07-13 12:16:56

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
zk21.com	ns1.alidns.com, ns2.alidns.com	18 records

✅ Authoritative Response

Server:120.76.107.45

NS records: ns1.alidns.com, ns2.alidns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for zk21.com (unsigned zone)

⏱️ Timing

Total: 3618ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`ns2.alidns.com, ns1.alidns.com`
SOA	1	`ns1.alidns.com hostmaster.hichina.com`

📌 Glue Records Collected

Total: 18

Out-of-bailiwick: 18 (ns1.alidns.com, ns1.alidns.com, ns1.alidns.com...)

Analysis

Hierarchy

zk21.com is a parent domain of www.zk21.com.

Name Servers

The NS records for zk21.com delegate to ns1.alidns.com and ns2.alidns.com.

zk21.com shares its name server setup with other domains, including yangchaow.com, 422048.com, www.nmjc.net.cn and two others.

zk21.com shares at least some of its name servers with other domains, including bdluo.com, uncoding.com, 9986hg.com and two others.

These name servers are frequently seen alongside ns7.alidns.com, ns8.alidns.com, dns10.hichina.com and 7 other name servers.

Host names with 9 IP numbers:

ns1.alidns.com maps to 39.96.153.45, 39.96.153.55, 47.118.199.205 and 6 additional IP addresses.

ns2.alidns.com maps to 39.96.153.46, 39.96.153.56, 47.118.199.206 and 6 additional IP addresses.

zk21.com - robtex.com

zk21.com

com