`knowledge21.com`

DNSSEC	⚠️ Not signed
A	195.200.2.150^{🇬🇧 IIHOS001195.200.0.0/21}
		PTR	`srv539973.hstgr.cloud`
NS	`paityn.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:2612^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`paityn.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c212^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`paityn.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2212^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`paityn.ns.cloudflare.com`
		A	108.162.194.18^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`paityn.ns.cloudflare.com`
		A	162.159.38.18^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`paityn.ns.cloudflare.com`
		A	172.64.34.18^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`paityn.ns.cloudflare.com`
NS	`ricardo.ns.cloudflare.com`
		A	2606:4700:58::a29f:2cd3^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ricardo.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c3d3^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`ricardo.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:23d3^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`ricardo.ns.cloudflare.com`
		A	108.162.195.211^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ricardo.ns.cloudflare.com`
		A	162.159.44.211^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ricardo.ns.cloudflare.com`
		A	172.64.35.211^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ricardo.ns.cloudflare.com`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c17::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bl-in-f26.1e100.net`
		A	192.178.155.27^{🇺🇸 Google192.178.155.0/24}
			PTR	`yuiadrs-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1a^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.26^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f26.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2607:f8b0:4023:3003::1a^{🇺🇸 Google2607:f8b0::/32}
			PTR	`yulnkjt-in-f26.1e100.net`
		A	172.253.145.26^{🇺🇸 Google172.253.145.0/24}
			PTR	`yulnkjt-in-f26.1e100.net`
MX	`aspmx2.googlemail.com`⁽¹⁰⁾
		A	2800:3f0:4003:c0f::1b^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.27^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f27.1e100.net`
MX	`aspmx3.googlemail.com`⁽¹⁰⁾
		A	2a00:1450:400b:c02::1a^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f26.1e100.net`
		A	172.253.116.27^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f27.1e100.net`
TXT	`8161463`
TXT	`ZOOM_verify_pp-R8xWwS2yNFEJK-Z1ihg`
TXT	`google-site-verification=CFSIyHPzfw6aRjPcqnPuH2EGzR62w2YCdYuE199Hlns`
TXT	`google-site-verification=qZtJrrMjC5OdtvBh9gedLW-0mdZjGJzk6NkK06NnBOA`
TXT	`google-site-verification=uoOhF02Iki_lAoN44oUPYVu8CrfmCRDYC28mNj-Oioo`
TXT	`google-site-verification=yNiAiUn2390N3gBbULBMi0KoqO_IP8YoXyRVM85-vLY`
TXT	`v=spf1 include:_spf.google.com include:amazonses.com include:spf.mcdns.com.br...`
SOA	`paityn.ns.cloudflare.com`dns@cloudflare.com serial=2402376271

`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=1778340216

Same first word

knowledge21.com

Similar names

21knowledge.com

DNS History

14 records (8 active, 6 former)

●NSpaityn.ns.cloudflare.com2026-02-15 → 2026-05-09 · 3 obs

○ 2017-10-07 23:11:48
● 2026-02-15 19:10:52
● 2026-05-09 15:28:26

●NSricardo.ns.cloudflare.com2026-02-15 → 2026-05-09 · 3 obs

○ 2017-10-07 23:11:48
● 2026-02-15 19:10:52
● 2026-05-09 15:28:26

○NSuk2net.com2015-05-28 → 2017-10-07 · 5 obs

○ 2007-08-16 06:51:38
● 2015-05-28 17:51:30
● 2017-10-07 23:11:48
○ 2026-02-15 19:10:52
○ 2026-05-09 15:28:26

○NSultra103.uk2.net2007-08-16 → 2017-10-07 · 4 obs

● 2007-08-16 06:51:38
● 2017-10-07 23:11:48
○ 2026-02-15 19:10:52
○ 2026-05-09 15:28:26

○NSultra104.uk2.net2007-08-16 → 2017-10-07 · 4 obs

● 2007-08-16 06:51:38
● 2017-10-07 23:11:48
○ 2026-02-15 19:10:52
○ 2026-05-09 15:28:26

●MXalt1.aspmx.l.google.com2017-10-07 → 2026-05-09 · 3 obs

○ 2016-12-31 07:01:14
● 2017-10-07 23:11:48
● 2026-05-09 15:28:26

●MXalt2.aspmx.l.google.com2017-10-07 → 2026-05-09 · 3 obs

○ 2016-12-31 07:01:14
● 2017-10-07 23:11:48
● 2026-05-09 15:28:26

●MXaspmx.l.google.com2017-10-07 → 2026-05-09 · 3 obs

○ 2016-12-31 07:01:14
● 2017-10-07 23:11:48
● 2026-05-09 15:28:26

●MXaspmx2.googlemail.com2017-10-07 → 2026-05-09 · 3 obs

○ 2016-12-31 07:01:14
● 2017-10-07 23:11:48
● 2026-05-09 15:28:26

●MXaspmx3.googlemail.com2017-10-07 → 2026-05-09 · 3 obs

○ 2016-12-31 07:01:14
● 2017-10-07 23:11:48
● 2026-05-09 15:28:26

○MXuk2mxarray3.uk2.net2007-08-16 → 2016-12-31 · 4 obs

● 2007-08-16 06:51:38
● 2016-12-31 07:01:14
○ 2017-10-07 23:11:48
○ 2026-05-09 15:28:26

●A195.200.2.1502026-02-15 → 2026-05-09 · 3 obs

○ 2017-10-07 23:11:48
● 2026-02-15 19:10:52
● 2026-05-09 15:28:26

○A23.92.28.1522017-10-07 → 2017-10-07 · 4 obs

○ 2016-12-31 07:01:14
● 2017-10-07 23:11:48
○ 2026-02-15 19:10:52
○ 2026-05-09 15:28:26

○A83.170.69.532007-08-16 → 2016-12-31 · 4 obs

● 2007-08-16 06:51:38
● 2016-12-31 07:01:14
○ 2017-10-07 23:11:48
○ 2026-05-09 15:28:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	h.gtld-servers.net, b.gtld-servers.net, m.gtld-servers.net, a.gtld-servers.net...	-
knowledge21.com	paityn.ns.cloudflare.com, ricardo.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.194.18

NS records: paityn.ns.cloudflare.com, ricardo.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for knowledge21.com (unsigned zone)

⏱️ Timing

Total: 365ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`195.200.2.150`
NS	2	`paityn.ns.cloudflare.com, ricardo.ns.cloudflare.com`
MX	5	`aspmx.l.google.com (pri: 1), aspmx2.googlemail.com (pri: 10)...`
TXT	7	`8161463, ZOOM_verify_pp-R8xWwS2yNFEJK-Z1ihg...`
SOA	1	`paityn.ns.cloudflare.com dns.cloudflare.`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (paityn.ns.cloudflare.com, paityn.ns.cloudflare.com, paityn.ns.cloudflare.com...)

Analysis

IP Addresses

knowledge21.com points to a single IP address: 195.200.2.150.

Other host names such as srv539973.hstgr.cloud and k21.com.br share IP numbers with knowledge21.com.

Name Servers

knowledge21.com is delegated to two name servers: paityn.ns.cloudflare.com and ricardo.ns.cloudflare.com.

knowledge21.com uses the same name server setup as other domains, including hack.bible, ipuc.app, manageengine.se, audiologyplanet.com and wawardcv.com.

At least part of the name servers for knowledge21.com are shared with other domains, for instance privacy-registry.com, gammaedgemedia.click, manusdei.net, myscz.cn and terrazone-union.forum.

These name servers are often used together with ajay.ns.cloudflare.com, mia.ns.cloudflare.com and sergi.ns.cloudflare.com.

Host names with six IP numbers:

paityn.ns.cloudflare.com points to: 2606:4700:50::a29f:2612, 2803:f800:50::6ca2:c212, 2a06:98c1:50::ac40:2212, 108.162.194.18, 162.159.38.18 and 172.64.34.18.

ricardo.ns.cloudflare.com points to: 2606:4700:58::a29f:2cd3, 2803:f800:50::6ca2:c3d3, 2a06:98c1:50::ac40:23d3, 108.162.195.211, 162.159.44.211 and 172.64.35.211.

Mail Servers

knowledge21.com is handled by five mail servers: aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx.l.google.com, alt1.aspmx.l.google.com and alt2.aspmx.l.google.com.

knowledge21.com shares at least some mail servers with other domains, for example ns500734.ns500699.ns500693.ns500734.ns500693.ns500699.ns500588.ns500693.ns500699.ns500632.ns500632.ns500588.ns500588.ns500602.ns500578.ns500110.dtrkdll.com, ns500699.ns500693.ns500734.ns500699.ns500699.ns500734.ns500734.ns500612.ns500632.ns500588.ns500632.dtrkdll.com, ns500742.ns500671.ns500742.ns500754.ns500731.ns500671.ns500671.ns500704.ns500688.ns500649.ns500649.ns500666.ns500142.lusty(0x736c7574)z.com, invagen.com and suryavansicreation.com.

These mail servers are commonly used alongside alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx4.googlemail.com and aspmx5.googlemail.com.

Host names with two IP numbers: aspmx2.googlemail.com points to 2800:3f0:4003:c0f::1b and 108.177.123.27; aspmx3.googlemail.com points to 2a00:1450:400b:c02::1a and 172.253.116.27; aspmx.l.google.com points to 2607:f8b0:4004:c17::1a and 192.178.155.27; alt1.aspmx.l.google.com points to 2800:3f0:4003:c0f::1a and 108.177.123.26; alt2.aspmx.l.google.com points to 2607:f8b0:4023:3003::1a and 172.253.145.26.

knowledge21.com - robtex.com

knowledge21.com

com

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

Name Servers

Mail Servers

`knowledge21.com`

`com`