`courseonline.us`

DNSSEC	⚠️ Not signed
NS	`ns1.siteground.net` ⭐
		A	75.2.77.104^{🇺🇸 Amazon75.2.64.0/20}
			PTR	`ac4b097dbd0dd6307.awsglobalaccelerator.com`
NS	`ns2.siteground.net`
		A	99.83.229.113^{🇺🇸 Amazon99.83.224.0/20}
			PTR	`ac4b097dbd0dd6307.awsglobalaccelerator.com`
SOA	`ns1.siteground.net`admins@siteground.com serial=2

`us`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.cctld.us` ⭐
	NS	`b.cctld.us`
	NS	`f.cctld.us`
	NS	`k.cctld.us`
	NS	`m.cctld.us`
	NS	`n.cctld.us`
	NS	`w.cctld.us`
	NS	`x.cctld.us`
	NS	`y.cctld.us`
	SOA	`a.cctld.us`admin@tldns.godaddy serial=1774502208

Same first word

courseonline.org

courseonline.it

courseonline.ru

courseonline.us

courseonline.net

courseonline.com.au

courseonline.com

courseonline.in

Similar names

DNS History

2 records (2 active, 0 former)

●NSns1.siteground.net2026-03-02 → 2026-03-26 · 2 obs

● 2026-03-02 04:05:20
● 2026-03-26 05:26:28

●NSns2.siteground.net2026-03-02 → 2026-03-26 · 2 obs

● 2026-03-02 04:05:20
● 2026-03-26 05:26:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
us	b.cctld.us, f.cctld.us, k.cctld.us, m.cctld.us...	-
courseonline.us	ns1.siteground.net, ns2.siteground.net	-

✅ Authoritative Response

Server:75.2.77.104

NS records: ns1.siteground.net, ns2.siteground.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for courseonline.us (unsigned zone)

⏱️ Timing

Total: 170ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`ns1.siteground.net, ns2.siteground.net`
SOA	1	`ns1.siteground.net admins.siteground.com`

Analysis

Name Servers

courseonline.us has two name servers: ns1.siteground.net and ns2.siteground.net.

courseonline.us shares the same name server setup as other domains, for example golden-shark.com, goldfinch.tv, acehoward.net, christianhopecenter.com and chinasona.org.

courseonline.us shares some name servers with other domains, for example singaporesindhi.com.sg, chrismossgolf.co.uk, tikv.nl, alturix.com and cycle4alz.org.

Host names with a single IP:

ns1.siteground.net points to 75.2.77.104

ns2.siteground.net points to 99.83.229.113

courseonline.us - robtex.com

courseonline.us

us