`knowledgecourses.com`

DNSSEC	⚠️ Not signed
A	91.195.240.123^{🇩🇪 SEDO91.195.240.0/23 -NET-PI}
NS	`ns1.dnsowl.com` ⭐
		A	2400:cb00:2049:1::a29f:1a88^{🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street}
		A	2400:cb00:2049:1::a29f:1bad^{🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street}
		A	162.159.26.136^{Cloudflare162.159.26.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	162.159.27.173^{Cloudflare162.159.27.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`ns2.dnsowl.com`
		A	2400:cb00:2049:1::a29f:1a31^{🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street}
		A	2400:cb00:2049:1::a29f:1b82^{🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street}
		A	162.159.26.49^{Cloudflare162.159.26.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	162.159.27.130^{Cloudflare162.159.27.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`ns3.dnsowl.com`
		A	2400:cb00:2049:1::a29f:1aea^{🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street}
		A	2400:cb00:2049:1::a29f:1b62^{🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street}
		A	162.159.26.234^{Cloudflare162.159.26.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	162.159.27.98^{Cloudflare162.159.27.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
SOA	`ns1.dnsowl.com`hostmaster@dnsowl.com serial=1776016014

`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=1776014382

Same first word

knowledgecourses.com

Similar names

knowledgesources.com

DNS History

12 records (4 active, 8 former)

●NSns1.dnsowl.com2026-04-10 → 2026-04-12 · 3 obs

○ 2020-02-18 10:57:56
● 2026-04-10 19:16:58
● 2026-04-12 17:49:54

●NSns2.dnsowl.com2026-04-10 → 2026-04-12 · 3 obs

○ 2020-02-18 10:57:56
● 2026-04-10 19:16:58
● 2026-04-12 17:49:54

●NSns3.dnsowl.com2026-04-10 → 2026-04-12 · 3 obs

○ 2020-02-18 10:57:56
● 2026-04-10 19:16:58
● 2026-04-12 17:49:54

○NSns37.domaincontrol.com2015-05-29 → 2016-07-15 · 4 obs

● 2015-05-29 12:25:52
● 2016-07-15 14:57:46
○ 2017-03-27 07:54:54
○ 2026-04-12 17:49:54

○NSns38.domaincontrol.com2015-05-29 → 2016-07-15 · 4 obs

● 2015-05-29 12:25:52
● 2016-07-15 14:57:46
○ 2017-03-27 07:54:54
○ 2026-04-12 17:49:54

○NSns65.domaincontrol.com2020-02-18 → 2020-02-18 · 4 obs

○ 2017-03-27 07:54:54
● 2020-02-18 10:57:56
○ 2026-04-10 19:16:58
○ 2026-04-12 17:49:54

○NSns66.domaincontrol.com2020-02-18 → 2020-02-18 · 4 obs

○ 2017-03-27 07:54:54
● 2020-02-18 10:57:56
○ 2026-04-10 19:16:58
○ 2026-04-12 17:49:54

○MXmailstore1.asia.secureserver.net2015-05-29 → 2016-07-15 · 4 obs

● 2015-05-29 12:25:52
● 2016-07-15 14:57:46
○ 2017-03-27 07:54:54
○ 2026-04-12 17:49:54

○MXsmtp.asia.secureserver.net2015-05-29 → 2016-07-15 · 4 obs

● 2015-05-29 12:25:52
● 2016-07-15 14:57:46
○ 2017-03-27 07:54:54
○ 2026-04-12 17:49:54

○A50.63.202.412015-05-29 → 2016-07-15 · 4 obs

● 2015-05-29 12:25:52
● 2016-07-15 14:57:46
○ 2017-03-27 07:54:54
○ 2026-04-12 17:49:54

○A50.63.202.822020-02-18 → 2020-02-18 · 4 obs

○ 2017-03-27 07:54:54
● 2020-02-18 10:57:56
○ 2026-04-10 19:16:58
○ 2026-04-12 17:49:54

●A91.195.240.1232026-04-10 → 2026-04-12 · 3 obs

○ 2020-02-18 10:57:56
● 2026-04-10 19:16:58
● 2026-04-12 17:49:54

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
knowledgecourses.com	ns1.dnsowl.com, ns2.dnsowl.com, ns3.dnsowl.com	12 records

✅ Authoritative Response

Server:162.159.26.136

NS records: ns1.dnsowl.com, ns2.dnsowl.com, ns3.dnsowl.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for knowledgecourses.com (unsigned zone)

⏱️ Timing

Total: 321ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`91.195.240.123`
NS	3	`ns1.dnsowl.com, ns2.dnsowl.com...`
SOA	1	`ns1.dnsowl.com hostmaster.dnsowl.com`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (ns1.dnsowl.com, ns1.dnsowl.com, ns1.dnsowl.com...)

Analysis

IP Addresses

knowledgecourses.com resolves to one IP number: 91.195.240.123.

Other host names, for instance mail5.me, 50statesilver.com, safe-google.help, gardenersenvy.com and 135782468.xyz share IP numbers with knowledgecourses.com.

Name Servers

knowledgecourses.com is delegated to three name servers: ns1.dnsowl.com, ns2.dnsowl.com and ns3.dnsowl.com.

knowledgecourses.com at least partially shares name servers with other domains, including wisergroup.com, eastwoodtitle.com, onlauth.com, oktaiwan.org and kinkys.com.

Host names with four IP numbers:

ns1.dnsowl.com points to 2400:cb00:2049:1::a29f:1a88, 2400:cb00:2049:1::a29f:1bad, 162.159.26.136 and 162.159.27.173.

ns2.dnsowl.com points to 2400:cb00:2049:1::a29f:1a31, 2400:cb00:2049:1::a29f:1b82, 162.159.26.49 and 162.159.27.130.

ns3.dnsowl.com points to 2400:cb00:2049:1::a29f:1aea, 2400:cb00:2049:1::a29f:1b62, 162.159.26.234 and 162.159.27.98.

knowledgecourses.com - robtex.com