`courseofconstruction.com`

DNSSEC	⚠️ Not signed
A	40.112.243.28^{🇺🇸 Microsoft40.112.0.0/13}
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`
TXT	`jp4f38n7essopgdt68emiasei`
TXT	`v=spf1 +a +mx +ip4:23.235.220.241 ~all`
TXT	`u46rqcciretoqvglfcfrh5qmt6`
SOA	`ns17.domaincontrol.com`dns@jomax.net 2022-09-22 #0

`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=1785662977

Previously MX for

courseofconstruction.com

Same first word

courseofconstruction.com

DNS History

8 records (3 active, 5 former)

○NSns1.grow-dev.com2015-06-30 → 2017-03-25 · 4 obs

● 2015-06-30 03:53:00
● 2017-03-25 05:10:24
○ 2026-03-30 01:04:50
○ 2026-08-02 09:35:22

●NSns17.domaincontrol.com2026-03-30 → 2026-08-02 · 3 obs

○ 2017-03-25 05:10:24
● 2026-03-30 01:04:50
● 2026-08-02 09:35:22

●NSns18.domaincontrol.com2026-03-30 → 2026-08-02 · 3 obs

○ 2017-03-25 05:10:24
● 2026-03-30 01:04:50
● 2026-08-02 09:35:22

○NSns2.grow-dev.com2015-06-30 → 2017-03-25 · 4 obs

● 2015-06-30 03:53:00
● 2017-03-25 05:10:24
○ 2026-03-30 01:04:50
○ 2026-08-02 09:35:22

○MXcourseofconstruction.com2015-06-30 → 2017-03-25 · 4 obs

● 2015-06-30 03:53:00
● 2017-03-25 05:10:24
○ 2026-03-30 01:04:50
○ 2026-08-02 09:35:22

○A191.236.80.122015-11-09 → 2017-03-25 · 5 obs

○ 2015-06-30 03:53:00
● 2015-11-09 12:16:22
● 2017-03-25 05:10:24
○ 2026-03-30 01:04:50
○ 2026-08-02 09:35:22

○A23.235.220.2412015-06-30 → 2015-06-30 · 3 obs

● 2015-06-30 03:53:00
○ 2015-11-09 12:16:22
○ 2026-08-02 09:35:22

●A40.112.243.282026-03-30 → 2026-08-02 · 3 obs

○ 2017-03-25 05:10:24
● 2026-03-30 01:04:50
● 2026-08-02 09:35:22

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	i.gtld-servers.net, j.gtld-servers.net, k.gtld-servers.net, l.gtld-servers.net...	-
courseofconstruction.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 courseofconstruction.com (unsigned zone)

⏱️ Timing

Total: 140ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`40.112.243.28`
NS	2	`ns17.domaincontrol.com, ns18.domaincontrol.com`
TXT	3	`jp4f38n7essopgdt68emiasei, v=spf1 +a +mx +ip4:23.235.220.241 ~all...`
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

courseofconstruction.com resolves to one IP address: 40.112.243.28.

ldkventures.com, usbencoder.com, team.ccdoa.net and two other host names share IP numbers with courseofconstruction.com.

Name Servers

DNS delegation for courseofconstruction.com points to two name servers: ns17.domaincontrol.com and ns18.domaincontrol.com.

courseofconstruction.com uses the same name servers as several other domains — among them blacksoundrecords.com, westcoastcottage.ca, letscoast.com and two more.

courseofconstruction.com has partial name server overlap with other domains, including marketopinionworldwide.com.

ns17.domaincontrol.com directs to 97.74.108.9 and 2603:5:21c0::9. ns18.domaincontrol.com directs to 173.201.76.9 and 2603:5:22c0::9. Each host name carries two IP addresses.

courseofconstruction.com - robtex.com