🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`mastercourses.dev`

DNSSEC	⚠️ Not signed
A	5.252.230.199^{🇵🇱 LHPL5.252.228.0/22}
NS	`ns.lh.pl` ⭐
		A	3.67.205.197^{🇩🇪 Amazon3.64.0.0/12 EC2 FRA Prefix}
			PTR	`ec2-3-67-205-197.eu-central-1.compute.amazonaws.com`
		A	3.76.92.90^{🇩🇪 Amazon3.64.0.0/12 EC2 FRA Prefix}
			PTR	`ec2-3-76-92-90.eu-central-1.compute.amazonaws.com`
NS	`ns2.lighthosting.net`
		A	18.198.204.241^{🇩🇪 Amazon18.198.0.0/15 EC2 FRA prefix}
			PTR	`ec2-18-198-204-241.eu-central-1.compute.amazonaws.com`
		A	52.57.104.17^{🇩🇪 Amazon52.57.0.0/16 EC2 FRA VPC prefix}
			PTR	`ec2-52-57-104-17.eu-central-1.compute.amazonaws.com`
MX	`mail11.lh.pl` ⭐
		A	5.252.228.53^{🇵🇱 LHPL5.252.228.0/22}
		A	5.252.228.60^{🇵🇱 LHPL5.252.228.0/22}
			PTR	`mail11.lh.pl`
		A	5.252.228.84^{🇵🇱 LHPL5.252.228.0/22}
			PTR	`mail11.lh.pl`
		A	5.252.228.106^{🇵🇱 LHPL5.252.228.0/22}
			PTR	`mail11.lh.pl`
		A	5.252.228.151^{🇵🇱 LHPL5.252.228.0/22}
		A	5.252.228.231^{🇵🇱 LHPL5.252.228.0/22}
			PTR	`mail11.lh.pl`
		A	5.252.229.104^{🇵🇱 LHPL5.252.228.0/22}
		A	62.122.190.26^{🇵🇱 LHPL62.122.190.0/24}
		A	94.154.117.26^{🇵🇱 LHPL94.154.117.0/24}
			PTR	`mail11.lh.pl`
TXT	`v=spf1 include:_spf.mlsend.com include:_spf.lh.pl -all`
SOA	`ns.lh.pl`root@lh.pl 2008-05-27 #1

`dev`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns-tld1.charlestonroadregistry.com` ⭐
	NS	`ns-tld2.charlestonroadregistry.com`
	NS	`ns-tld3.charlestonroadregistry.com`
	NS	`ns-tld4.charlestonroadregistry.com`
	NS	`ns-tld5.charlestonroadregistry.com`
	SOA	`ns-tld1.charlestonroadregistry.com`cloud-dns-hostmaster@google.com serial=1

🔒 HSTS Preload (+subdomains)

Same first word

mastercourses.vn

mastercourses.shop

mastercourses.dev

mastercourses.info

mastercourses.ai

mastercourses.com

mastercourses.xyz

mastercourses.com.my

Similar names

Previous names

Next names

DNS History

4 records (4 active, 0 former)

●NSns.lh.pl2026-10-08 → 2026-11-15 · 2 obs

● 2026-10-08 00:35:42
● 2026-11-15 21:57:04

●NSns2.lighthosting.net2026-10-08 → 2026-11-15 · 2 obs

● 2026-10-08 00:35:42
● 2026-11-15 21:57:04

●MXmail11.lh.pl2026-10-08 → 2026-11-15 · 2 obs

● 2026-10-08 00:35:42
● 2026-11-15 21:57:04

●A5.252.230.1992026-10-08 → 2026-11-15 · 2 obs

● 2026-10-08 00:35:42
● 2026-11-15 21:57:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dev	ns-tld1.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld5.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com...	10 records
mastercourses.dev	ns.lh.pl, ns2.lighthosting.net	-

✅ Authoritative Response

Server:3.76.92.90

NS records: ns.lh.pl, ns2.lighthosting.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

Root DNSKEY fetch failed: Error: connect EADDRNOTAVAIL 198.41.0.4:53 - Local (0.0.0.0:0)

⏱️ Timing

Total: 1403ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`5.252.230.199`
NS	2	`ns.lh.pl, ns2.lighthosting.net`
MX	1	`mail11.lh.pl (pri: 5)`
TXT	1	`v=spf1 include:_spf.mlsend.com include:_`
SOA	1	`ns.lh.pl root.lh.pl`

📌 Glue Records Collected

Total: 10

Out-of-bailiwick: 10 (ns-tld1.charlestonroadregistry.com, ns-tld1.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com...)

Analysis

IP Addresses

mastercourses.dev points to a single IP number: 5.252.230.199.

Additional host names — lukksarna.com, pegazing.pl, sportsystem.com.pl and two others — share IP numbers with mastercourses.dev.

Name Servers

The NS records for mastercourses.dev delegate to ns2.lighthosting.net and ns.lh.pl.

mastercourses.dev shares its name server setup with other domains, including dddlider.pl, kondefer.com, lesko24.pl and two others.

mastercourses.dev has at least partial name server overlap with other domains, such as annamrowiec.com.pl, elitetrainingsiedlce.pl, mwbud.pl and two others.

It is common to find these name servers paired with the name servers ns2.lh.pl.

ns2.lighthosting.net resolves to 18.198.204.241 and 52.57.104.17. Likewise, ns.lh.pl resolves to 3.67.205.197 and 3.76.92.90 — two IP addresses apiece.

Mail Servers

mastercourses.dev has one mail server: mail11.lh.pl.

mastercourses.dev shares the same mail server setup as other domains, including bzgazserwis.pl, oskstrazak.pl, dietik.pro and two others.

The mail servers of mastercourses.dev are at least partially shared with other domains, including centrum-uroda.pl.

mail11.lh.pl points to 9 IP numbers: 5.252.228.53, 5.252.228.60, 5.252.228.84 and 6 other.

mastercourses.dev - robtex.com