`certifycourses.com`

DNSSEC	⚠️ Not signed
A	207.148.248.143^{🇺🇸 EIG-29873207.148.248.0/24}
		PTR	`ip-207-148-248-143.defastlink.net`
NS	`ns.buydomains.com` ⚠️ Not in zone NS records
		A	52.20.26.87^{🇺🇸 Amazon52.20.0.0/14 EC2 IAD prefix}
			PTR	`ec2-52-20-26-87.compute-1.amazonaws.com`
NS	`this-domain-for-sale.com` ⚠️ Not in zone NS records
		A	52.20.26.87^{🇺🇸 Amazon52.20.0.0/14 EC2 IAD prefix}
			PTR	`ec2-52-20-26-87.compute-1.amazonaws.com`

`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

certifycourses.com

DNS History

9 records (3 active, 6 former)

●NSns.buydomains.com2017-10-16 → 2026-03-23 · 3 obs

○ 2016-12-15 02:49:10
● 2017-10-16 05:19:46
● 2026-03-23 04:26:18

○NSns1.domenai.lt2016-12-15 → 2016-12-15 · 3 obs

● 2016-12-15 02:49:10
○ 2017-10-16 05:19:46
○ 2026-03-23 04:26:18

○NSns2.domenai.lt2016-12-15 → 2016-12-15 · 3 obs

● 2016-12-15 02:49:10
○ 2017-10-16 05:19:46
○ 2026-03-23 04:26:18

○NSns3.domenai.lt2016-12-15 → 2016-12-15 · 3 obs

● 2016-12-15 02:49:10
○ 2017-10-16 05:19:46
○ 2026-03-23 04:26:18

●NSthis-domain-for-sale.com2026-03-06 → 2026-03-23 · 3 obs

○ 2017-10-16 05:19:46
● 2026-03-06 14:17:58
● 2026-03-23 04:26:18

○MXmail.certifycourses.com2016-12-15 → 2016-12-15 · 3 obs

● 2016-12-15 02:49:10
○ 2017-10-16 05:19:46
○ 2026-03-23 04:26:18

○A141.136.40.1192016-12-15 → 2016-12-15 · 3 obs

● 2016-12-15 02:49:10
○ 2017-10-16 05:19:46
○ 2026-03-23 04:26:18

●A207.148.248.1432026-03-06 → 2026-03-23 · 3 obs

○ 2017-10-16 05:19:46
● 2026-03-06 14:17:58
● 2026-03-23 04:26:18

○A209.99.64.432017-10-16 → 2017-10-16 · 4 obs

○ 2016-12-15 02:49:10
● 2017-10-16 05:19:46
○ 2026-03-06 14:17:58
○ 2026-03-23 04:26:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	c.gtld-servers.net, d.gtld-servers.net, f.gtld-servers.net, l.gtld-servers.net...	-
certifycourses.com	ns.buydomains.com, this-domain-for-sale.com	2 records

✅ Authoritative Response

Server:52.20.26.87

NS records: ns.buydomains.com, this-domain-for-sale.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for certifycourses.com (unsigned zone)

⏱️ Timing

Total: 128ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`207.148.248.143`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns.buydomains.com, this-domain-for-sale.com)

Analysis

IP Addresses

certifycourses.com resolves to a single IP: 207.148.248.143.

Other host names, for instance elegantchange.com, zerodollars.com, pdksystems.com, mx.accidentalsports.com and rudity.com share IP numbers with certifycourses.com.

Name Servers

certifycourses.com has two name servers: this-domain-for-sale.com and ns.buydomains.com.

certifycourses.com shares the same name server setup as other domains, for example photoclear.com, simplestash.com, reptilesgalore.com, idalarm.com and bodybuildingsupplementation.com.

certifycourses.com at least partially shares name servers with other domains; for example ekki.org and internetrockstars.com; rpsl.net and searchadvance.com.

These name servers are commonly used with the name servers ns2.buydomains.com.

Host names with one IP number:

this-domain-for-sale.com points to: 52.20.26.87

ns.buydomains.com points to: 52.20.26.87

Names pointing to 52.20.26.87: this-domain-for-sale.com and ns.buydomains.com

certifycourses.com - robtex.com