`courseopedia.com`

DNSSEC	⚠️ Not signed
A	76.76.21.21^{🇺🇸 Amazon76.76.21.0/24 EC2 Prefix}
		PTR	`ip-76-76-21-21.defastlink.net`
NS	`ns17.domaincontrol.com` ⭐
		A	2603:5:21c0::9^{🇺🇸 GODADDY-DNS2603:5:21c0::/44}
			PTR	`ns17.domaincontrol.com`
		A	97.74.108.9^{🇺🇸 GODADDY-DNS97.74.108.0/23}
			PTR	`ns17.domaincontrol.com`
NS	`ns18.domaincontrol.com`
		A	2603:5:22c0::9^{🇺🇸 GODADDY-DNS2603:5:22c0::/44}
			PTR	`ns18.domaincontrol.com`
		A	173.201.76.9^{🇺🇸 GODADDY-DNS173.201.76.0/23}
			PTR	`ns18.domaincontrol.com`
SOA	`ns17.domaincontrol.com`dns@jomax.net 2025-01-01 #2

`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=1771291435

Same first word

courseopedia.com

DNS History

22 records (3 active, 19 former)

○NSbuy.internettraffic.com2016-04-16 → 2016-04-16 · 4 obs

○ 2016-01-22 04:52:40
● 2016-04-16 17:14:44
○ 2016-11-19 23:54:42
○ 2026-03-24 10:44:40

○NSns09.domaincontrol.com2016-01-22 → 2016-01-22 · 4 obs

○ 2015-11-01 05:37:46
● 2016-01-22 04:52:40
○ 2016-04-16 17:14:44
○ 2026-03-24 10:44:40

○NSns1.dreamhost.com2017-09-01 → 2017-09-01 · 3 obs

○ 2016-11-19 23:54:42
● 2017-09-01 15:26:26
○ 2026-03-24 10:44:40

○NSns1.gearhost.com2015-06-16 → 2015-11-01 · 4 obs

● 2015-06-16 00:10:02
● 2015-11-01 05:37:46
○ 2016-01-22 04:52:40
○ 2026-03-24 10:44:40

○NSns1.uniregistrymarket.link2016-11-19 → 2016-11-19 · 4 obs

○ 2016-04-16 17:14:44
● 2016-11-19 23:54:42
○ 2017-09-01 15:26:26
○ 2026-03-24 10:44:40

○NSns10.domaincontrol.com2016-01-22 → 2016-01-22 · 4 obs

○ 2015-11-01 05:37:46
● 2016-01-22 04:52:40
○ 2016-04-16 17:14:44
○ 2026-03-24 10:44:40

●NSns17.domaincontrol.com2026-03-24 → 2026-03-24 · 2 obs

○ 2017-09-01 15:26:26
● 2026-03-24 10:44:40

●NSns18.domaincontrol.com2026-03-24 → 2026-03-24 · 2 obs

○ 2017-09-01 15:26:26
● 2026-03-24 10:44:40

○NSns2.dreamhost.com2017-09-01 → 2017-09-01 · 3 obs

○ 2016-11-19 23:54:42
● 2017-09-01 15:26:26
○ 2026-03-24 10:44:40

○NSns2.gearhost.com2015-06-16 → 2015-11-01 · 4 obs

● 2015-06-16 00:10:02
● 2015-11-01 05:37:46
○ 2016-01-22 04:52:40
○ 2026-03-24 10:44:40

○NSns2.uniregistrymarket.link2016-11-19 → 2016-11-19 · 4 obs

○ 2016-04-16 17:14:44
● 2016-11-19 23:54:42
○ 2017-09-01 15:26:26
○ 2026-03-24 10:44:40

○NSns3.dreamhost.com2017-09-01 → 2017-09-01 · 3 obs

○ 2016-11-19 23:54:42
● 2017-09-01 15:26:26
○ 2026-03-24 10:44:40

○NSsell.internettraffic.com2016-04-16 → 2016-04-16 · 4 obs

○ 2016-01-22 04:52:40
● 2016-04-16 17:14:44
○ 2016-11-19 23:54:42
○ 2026-03-24 10:44:40

○MXmailstore1.secureserver.net2016-01-22 → 2016-01-22 · 3 obs

● 2016-01-22 04:52:40
○ 2016-04-16 17:14:44
○ 2026-03-24 10:44:40

○MXsmtp.secureserver.net2016-01-22 → 2016-01-22 · 3 obs

● 2016-01-22 04:52:40
○ 2016-04-16 17:14:44
○ 2026-03-24 10:44:40

○MXvade-in1.mail.dreamhost.com2017-09-01 → 2017-09-01 · 3 obs

○ 2016-04-16 17:14:44
● 2017-09-01 15:26:26
○ 2026-03-24 10:44:40

○MXvade-in2.mail.dreamhost.com2017-09-01 → 2017-09-01 · 3 obs

○ 2016-04-16 17:14:44
● 2017-09-01 15:26:26
○ 2026-03-24 10:44:40

○A173.236.168.1592017-09-01 → 2017-09-01 · 3 obs

○ 2016-11-19 23:54:42
● 2017-09-01 15:26:26
○ 2026-03-24 10:44:40

○A184.168.221.322016-01-22 → 2016-01-22 · 4 obs

○ 2015-11-01 05:37:46
● 2016-01-22 04:52:40
○ 2016-04-16 17:14:44
○ 2026-03-24 10:44:40

○A69.172.201.1532016-04-16 → 2016-11-19 · 5 obs

○ 2016-01-22 04:52:40
● 2016-04-16 17:14:44
● 2016-11-19 23:54:42
○ 2017-09-01 15:26:26
○ 2026-03-24 10:44:40

○A69.24.79.302015-06-16 → 2015-11-01 · 4 obs

● 2015-06-16 00:10:02
● 2015-11-01 05:37:46
○ 2016-01-22 04:52:40
○ 2026-03-24 10:44:40

●A76.76.21.212026-03-24 → 2026-03-24 · 2 obs

○ 2017-09-01 15:26:26
● 2026-03-24 10:44:40

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	f.gtld-servers.net, g.gtld-servers.net, i.gtld-servers.net, m.gtld-servers.net...	-
courseopedia.com	ns17.domaincontrol.com, ns18.domaincontrol.com	4 records

✅ Authoritative Response

Server:173.201.76.9

NS records: ns17.domaincontrol.com, ns18.domaincontrol.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for courseopedia.com (unsigned zone)

⏱️ Timing

Total: 167ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`76.76.21.21`
NS	2	`ns17.domaincontrol.com, ns18.domaincontrol.com`
SOA	1	`ns17.domaincontrol.com dns.jomax.net`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns17.domaincontrol.com, ns17.domaincontrol.com, ns18.domaincontrol.com...)

Analysis

IP Addresses

courseopedia.com resolves to one IP number: 76.76.21.21.

other host names including ejt.nu, satellites.co.nz, konicaminolta.dk, tajmscinema.sk and broadwaytheaterguide.com share IP numbers with courseopedia.com.

Name Servers

courseopedia.com is delegated to two name servers ns17.domaincontrol.com and ns18.domaincontrol.com.

courseopedia.com shares the same name server setup as other domains, for instance nciclb.net, kidsincrypto.com, ebranchtech.net, verbrev.com and egleus.com.

courseopedia.com shares name servers with other domains at least partially, for example cafepanuzzos.com and owc.com.

Host names with two IP numbers:

The host name ns17.domaincontrol.com points to 2603:5:21c0::9 and 97.74.108.9; the host name ns18.domaincontrol.com points to 2603:5:22c0::9 and 173.201.76.9.

courseopedia.com - robtex.com