`t-know.com`

DNSSEC	⚠️ Not signed
NS	`dns9.hichina.com` ⭐
		A	2408:4009:501::17^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.42^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.52^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.202^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.212^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.42^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.52^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.112^{🇨🇳 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	139.224.142.122^{🇨🇳 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	`dns10.hichina.com`
		A	2408:4009:501::18^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.41^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.51^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.201^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.211^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.41^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.51^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.111^{🇨🇳 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	139.224.142.121^{🇨🇳 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,}
MX	`mx1.feishu.cn` ⭐
		A	52.220.106.220^{🇸🇬 Amazon52.220.0.0/15 SIN prefix}
			PTR	`ec2-52-220-106-220.ap-southeast-1.compute.amazonaws.com`
MX	`mx2.feishu.cn`⁽⁵⁾
		A	101.126.58.225^{🇨🇳 VOLCANO-ENGINE101.126.56.0/21 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	122.14.229.0^{🇨🇳 CHINAMOBILE-CN122.14.224.0/20}
MX	`mx3.feishu.cn`⁽¹⁰⁾
		A	52.220.106.220^{🇸🇬 Amazon52.220.0.0/15 SIN prefix}
			PTR	`ec2-52-220-106-220.ap-southeast-1.compute.amazonaws.com`
		A	101.126.58.225^{🇨🇳 VOLCANO-ENGINE101.126.56.0/21 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	122.14.229.0^{🇨🇳 CHINAMOBILE-CN122.14.224.0/20}
TXT	`verification-code-site-App_feishu=uUDi9IgZ9nX8sZJ4pwG2`
TXT	`v=spf1 +include:_netblocks.m.feishu.cn -all`
SOA	`dns9.hichina.com`hostmaster@hichina.com 2026-01-12 #9

`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=1774655102

WOT: SAFE (60/100)

Subdomains

mail.t-know.com

Same first word

t-know.com

Similar names

k-town.com

k-town.ch

DNS History

10 records (5 active, 5 former)

●NSdns10.hichina.com2026-03-19 → 2026-03-28 · 3 obs

○ 2017-05-29 04:12:56
● 2026-03-19 07:29:34
● 2026-03-28 00:02:44

●NSdns9.hichina.com2026-03-19 → 2026-03-28 · 3 obs

○ 2017-05-29 04:12:56
● 2026-03-19 07:29:34
● 2026-03-28 00:02:44

○NSns1.ns-serve.net2015-08-14 → 2017-05-29 · 4 obs

● 2015-08-14 14:23:44
● 2017-05-29 04:12:56
○ 2026-03-19 07:29:34
○ 2026-03-28 00:02:44

○NSns2.ns-serve.net2015-08-14 → 2017-05-29 · 4 obs

● 2015-08-14 14:23:44
● 2017-05-29 04:12:56
○ 2026-03-19 07:29:34
○ 2026-03-28 00:02:44

○MXmail.t-know.com2015-08-14 → 2017-05-29 · 4 obs

● 2015-08-14 14:23:44
● 2017-05-29 04:12:56
○ 2026-03-19 07:29:34
○ 2026-03-28 00:02:44

●MXmx1.feishu.cn2026-03-19 → 2026-03-28 · 3 obs

○ 2017-05-29 04:12:56
● 2026-03-19 07:29:34
● 2026-03-28 00:02:44

●MXmx2.feishu.cn2026-03-19 → 2026-03-28 · 3 obs

○ 2017-05-29 04:12:56
● 2026-03-19 07:29:34
● 2026-03-28 00:02:44

●MXmx3.feishu.cn2026-03-19 → 2026-03-28 · 3 obs

○ 2017-05-29 04:12:56
● 2026-03-19 07:29:34
● 2026-03-28 00:02:44

○A127.0.0.12015-08-14 → 2015-08-14 · 3 obs

● 2015-08-14 14:23:44
○ 2015-09-24 08:48:06
○ 2026-03-28 00:02:44

○A185.67.158.1442015-09-24 → 2017-05-29 · 5 obs

○ 2015-08-14 14:23:44
● 2015-09-24 08:48:06
● 2017-05-29 04:12:56
○ 2026-03-19 07:29:34
○ 2026-03-28 00:02:44

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
t-know.com	dns9.hichina.com, dns10.hichina.com	18 records

✅ Authoritative Response

Server:120.76.107.41

NS records: dns9.hichina.com, dns10.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for t-know.com (unsigned zone)

⏱️ Timing

Total: 548ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`dns10.hichina.com, dns9.hichina.com`
MX	3	`mx2.feishu.cn (pri: 5), mx3.feishu.cn (pri: 10)...`
TXT	2	`v=spf1 +include:_netblocks.m.feishu.cn -, verification-code-site-App_feishu=uUDi9I`
SOA	1	`dns9.hichina.com hostmaster.hichina.com`

📌 Glue Records Collected

Total: 18

Out-of-bailiwick: 18 (dns9.hichina.com, dns9.hichina.com, dns9.hichina.com...)

Analysis

Hierarchy

t-know.com is the parent of mail.t-know.com.

Name Servers

t-know.com has two name servers: dns10.hichina.com and dns9.hichina.com.

t-know.com shares the same name server setup as other domains, for example newkunhua.cn, tatulaser.com, roundelstones.com, ansudoor.com and hbkccm.com.

t-know.com shares some name servers with other domains, for example zoumi.com, volsen-chem.com, jqian.com, bjweika.com and phpbin.cn.

Host names with nine IP numbers:

dns10.hichina.com points to 2408:4009:501::18, 39.96.153.41, 39.96.153.51, 47.118.199.201, 47.118.199.211, 120.76.107.41, 120.76.107.51, 139.224.142.111 and 139.224.142.121.

dns9.hichina.com points to 2408:4009:501::17, 39.96.153.42, 39.96.153.52, 47.118.199.202, 47.118.199.212, 120.76.107.42, 120.76.107.52, 139.224.142.112 and 139.224.142.122.

Mail Servers

t-know.com is handled by three mail servers: mx1.feishu.cn, mx2.feishu.cn and mx3.feishu.cn.

t-know.com shares some mail servers with other domains, at least partially; for instance ppmtdate.com, wanzhongtech.com, epochware.cn, canyutech.com and officeserver.cn.

these mail servers are commonly used alongside the mail servers mxbiz1.qq.com.

Host names with three IP numbers: mx3.feishu.cn points to 52.220.106.220, 101.126.58.225 and 122.14.229.0.

Host names with two IP numbers: mx2.feishu.cn points to 101.126.58.225 and 122.14.229.0.

Host names with one IP number: mx1.feishu.cn points to 52.220.106.220.

Host names pointing to 52.220.106.220: mx3.feishu.cn and mx1.feishu.cn.

Host names pointing to 101.126.58.225: mx3.feishu.cn and mx2.feishu.cn.

Host names pointing to 122.14.229.0: mx3.feishu.cn and mx2.feishu.cn.

t-know.com - robtex.com

t-know.com

com

Subdomains

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

Hierarchy

Name Servers

Mail Servers

`t-know.com`

`com`