`course-makers.com`

DNSSEC	⚠️ Not signed
A	103.169.142.0^{🇦🇺 CLOUDFLARESPECTRUM103.169.142.0/24 Canva Pty Ltd 110 Kippax Street}
NS	`ns1.systemdns.com` ⭐
		A	2604:4000:0:d:216:40:47:90^{🇨🇦 TUCOWS2604:4000::/48 -BRA-IPV6-BLK1.1/NET-2604:4000}
			PTR	`ns1.systemdns.com`
		A	216.40.47.90^{🇨🇦 TUCOWS216.40.47.0/24 -BRA-BLK1.4/NET-216-40-47-0}
			PTR	`ns1.systemdns.com`
NS	`ns2.systemdns.com`
		A	2604:4000:2800:d:64:99:148:16^{🇨🇦 TUCOWS-32604:4000:2800::/37 Tucows.com Co.}
			PTR	`ns2.systemdns.com`
		A	64.98.148.16^{🇨🇦 TUCOWS-364.98.144.0/20 Tucows.com Co.}
			PTR	`ns2.systemdns.com`
NS	`ns3.systemdns.com`
		A	2604:4000:0:d:64:99:96:36^{🇨🇦 TUCOWS2604:4000::/48 -BRA-IPV6-BLK1.1/NET-2604:4000}
			PTR	`ns3.systemdns.com`
		A	64.99.96.36^{🇨🇦 TUCOWS64.99.96.0/24 -BRA-BLK2.7.2}
			PTR	`ns3.systemdns.com`
SOA	`ns1.systemdns.com`hostmaster@systemdns.com serial=1753816107

`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

course-makers.com

DNS History

10 records (4 active, 6 former)

○NSns1.expertcertify.com2017-10-10 → 2017-10-10 · 3 obs

○ 2016-12-20 11:36:44
● 2017-10-10 20:36:38
○ 2026-03-23 15:51:10

●NSns1.systemdns.com2026-03-23 → 2026-03-23 · 2 obs

○ 2017-10-10 20:36:38
● 2026-03-23 15:51:10

○NSns13.domaincontrol.com2016-12-20 → 2016-12-20 · 3 obs

● 2016-12-20 11:36:44
○ 2017-10-10 20:36:38
○ 2026-03-23 15:51:10

○NSns14.domaincontrol.com2016-12-20 → 2016-12-20 · 3 obs

● 2016-12-20 11:36:44
○ 2017-10-10 20:36:38
○ 2026-03-23 15:51:10

○NSns2.expertcertify.com2017-10-10 → 2017-10-10 · 3 obs

○ 2016-12-20 11:36:44
● 2017-10-10 20:36:38
○ 2026-03-23 15:51:10

●NSns2.systemdns.com2026-03-23 → 2026-03-23 · 2 obs

○ 2017-10-10 20:36:38
● 2026-03-23 15:51:10

●NSns3.systemdns.com2026-03-23 → 2026-03-23 · 2 obs

○ 2017-10-10 20:36:38
● 2026-03-23 15:51:10

○MXmail.course-makers.com2017-10-10 → 2017-10-10 · 2 obs

● 2017-10-10 20:36:38
○ 2026-03-23 15:51:10

●A103.169.142.02026-03-23 → 2026-03-23 · 2 obs

○ 2017-10-10 20:36:38
● 2026-03-23 15:51:10

○A45.77.61.1472017-10-10 → 2017-10-10 · 2 obs

● 2017-10-10 20:36:38
○ 2026-03-23 15:51:10

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
course-makers.com	ns1.systemdns.com, ns2.systemdns.com, ns3.systemdns.com	6 records

✅ Authoritative Response

Server:216.40.47.90

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for course-makers.com (unsigned zone)

⏱️ Timing

Total: 187ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`103.169.142.0`
NS	3	`ns2.systemdns.com, ns3.systemdns.com...`
SOA	1	`ns1.systemdns.com hostmaster.systemdns.c`

📌 Glue Records Collected

Total: 6

Out-of-bailiwick: 6 (ns1.systemdns.com, ns1.systemdns.com, ns2.systemdns.com...)

Analysis

IP Addresses

course-makers.com points to a single IP: 103.169.142.0.

Other host names, for instance trashika.com, basesolve.com, victoryvacations.co, micomy.de and atex88.com share IP numbers with course-makers.com.

Name Servers

course-makers.com is delegated to three name servers: ns1.systemdns.com, ns2.systemdns.com and ns3.systemdns.com.

course-makers.com partially shares name servers with other domains; examples include suitdna.com, buonevacanze.net, pgnaeta.bc.ca, officeradio.co.uk and bodyexciting.com.

Host names with two IP numbers:

ns1.systemdns.com points to 2604:4000:0:d:216:40:47:90 and 216.40.47.90.

ns2.systemdns.com points to 2604:4000:2800:d:64:99:148:16 and 64.98.148.16.

ns3.systemdns.com points to 2604:4000:0:d:64:99:96:36 and 64.99.96.36.

course-makers.com - robtex.com