study.de - dns.ninja

`study.de`

DNSSEC	⚠️ Not signed
A	2a0a:4cc0:0:1255:1802:4bff:fea5:a382^{🇦🇹 netcup-AS2a0a:4cc0::/43}
		PTR	`s3.study.de`
A	152.53.3.14^{🇦🇹 netcup-AS152.53.0.0/22}
NS	`root-dns.netcup.net` ⭐
		A	2a03:4000:0:1::e1e1^{🇩🇪 netcup-AS2a03:4000::/32 NETCUP-GMBH}
			PTR	`root-dns.netcup.net`
		A	46.38.225.225^{🇩🇪 netcup-AS46.38.225.0/24}
			PTR	`root-dns.netcup.net`
NS	`second-dns.netcup.net`
		A	2a03:4000:2:24b::c7c7^{🇩🇪 netcup-AS2a03:4000::/32 NETCUP-GMBH}
			PTR	`second-dns.netcup.net`
		A	37.221.199.199^{🇩🇪 netcup-AS37.221.196.0/22}
			PTR	`second-dns.netcup.net`
NS	`third-dns.netcup.net`
		A	2a03:4001:0:106::3f44^{🇩🇪 netcup-AS2a03:4001::/32 NETCUP-GMBH}
			PTR	`third-dns.netcup.net`
		A	188.68.63.68^{🇩🇪 netcup-AS188.68.63.0/24 NETCUP-GMBH}
			PTR	`third-dns.netcup.net`
MX	`study-de.mail.eo.outlook.com` ⭐
		A	2a01:111:f403:ca04::9^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db7pr03cu00601.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::e^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db8pr02cu00106.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::1^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-as9pr07cu00301.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::c^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-as8pr05cu00304.inbound.protection.outlook.com`
		A	52.101.68.3^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db7pr03cu00403.inbound.protection.outlook.com`
		A	52.101.68.25^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db8pr02cu00101.inbound.protection.outlook.com`
		A	52.101.68.36^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db5pr02cu00104.inbound.protection.outlook.com`
		A	52.101.73.15^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am9pr04cu00107.inbound.protection.outlook.com`
TXT	`v=spf1 include:spf.protection.outlook.com -all`
TXT	`google-site-verification=lidbW6Tc9Pb8OYiAXSMNVjm3UHN0alN_jik_-OmQK6Q`
SOA	`root-dns.netcup.net`dnsadmin@netcup.net 2025-12-17 #34

`de`

	DNSSEC	🔒 Signed (DS record present)
	NS	`f.nic.de` ⭐
	NS	`a.nic.de`
	NS	`l.de.net` ⚠️ Not in parent delegation
	NS	`n.de.net` ⚠️ Not in parent delegation
	NS	`s.de.net` ⚠️ Not in parent delegation
	NS	`z.nic.de`
	SOA	`f.nic.de`dns-operations@denic.de serial=1784811976

WOT: SAFE (67/100)

Subdomains

s3.study.de

Same first word

study.com

study.mba

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DNS History

11 records (6 active, 5 former)

○NSns.namespace4you.de2015-06-30 → 2017-01-04 · 4 obs

● 2015-06-30 20:57:08
● 2017-01-04 13:38:06
○ 2026-03-12 00:10:04
○ 2026-07-23 13:12:36

○NSns2.namespace4you.de2015-06-30 → 2017-01-04 · 4 obs

● 2015-06-30 20:57:08
● 2017-01-04 13:38:06
○ 2026-03-12 00:10:04
○ 2026-07-23 13:12:36

●NSroot-dns.netcup.net2026-03-12 → 2026-07-23 · 3 obs

○ 2017-01-04 13:38:06
● 2026-03-12 00:10:04
● 2026-07-23 13:12:36

●NSsecond-dns.netcup.net2026-03-12 → 2026-07-23 · 3 obs

○ 2017-01-04 13:38:06
● 2026-03-12 00:10:04
● 2026-07-23 13:12:36

●NSthird-dns.netcup.net2026-03-12 → 2026-07-23 · 3 obs

○ 2017-01-04 13:38:06
● 2026-03-12 00:10:04
● 2026-07-23 13:12:36

●MXstudy-de.mail.eo.outlook.com2015-06-30 → 2026-07-23 · 2 obs

● 2015-06-30 20:57:08
● 2026-07-23 13:12:36

○A134.119.48.1062015-11-08 → 2017-01-04 · 5 obs

○ 2015-06-30 20:57:08
● 2015-11-08 16:57:38
● 2017-01-04 13:38:06
○ 2026-03-12 00:10:04
○ 2026-07-23 13:12:36

●A152.53.3.142026-03-12 → 2026-07-23 · 3 obs

○ 2017-01-04 13:38:06
● 2026-03-12 00:10:04
● 2026-07-23 13:12:36

○A2a00:1158:0:300:3340::12015-06-30 → 2015-06-30 · 3 obs

● 2015-06-30 20:57:08
○ 2015-11-08 16:57:38
○ 2026-07-23 13:12:36

●A2a0a:4cc0:0:1255:1802:4bff:fea5:a3822026-03-12 → 2026-07-23 · 3 obs

○ 2017-01-04 13:38:06
● 2026-03-12 00:10:04
● 2026-07-23 13:12:36

○A46.252.18.1842015-06-30 → 2015-06-30 · 3 obs

● 2015-06-30 20:57:08
○ 2015-11-08 16:57:38
○ 2026-07-23 13:12:36

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	a.nic.de, f.nic.de, z.nic.de	-
study.de	second-dns.netcup.net, root-dns.netcup.net, third-dns.netcup.net	-

✅ Authoritative Response

Server:46.38.225.225

NS records: second-dns.netcup.net, root-dns.netcup.net, third-dns.netcup.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for study.de (unsigned zone)

⏱️ Timing

Total: 730ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`152.53.3.14`
AAAA	1	`2a0a:4cc0:0:1255:1802:4bff:fea5:a382`
NS	3	`second-dns.netcup.net, root-dns.netcup.net...`
MX	1	`study-de.mail.eo.outlook.com (pri: 1)`
TXT	2	`google-site-verification=lidbW6Tc9Pb8OYi, v=spf1 include:spf.protection.outlook.co`
SOA	1	`root-dns.netcup.net dnsadmin.netcup.net`

Analysis

Hierarchy

s3.study.de is delegated beneath study.de.

IP Addresses

study.de has two IP addresses: 152.53.3.14 and 2a0a:4cc0:0:1255:1802:4bff:fea5:a382

There are other host names — s3.study.de among them — that share IP numbers with study.de.

Name Servers

DNS for study.de is handled by three authoritative name servers: root-dns.netcup.net, second-dns.netcup.net and third-dns.netcup.net.

There is at least partial name server overlap between study.de and other domains — hx0.de, ekant.de, tuerenstudio.eu and two more among them.

Three hostnames — root-dns.netcup.net, second-dns.netcup.net and third-dns.netcup.net — each have two IP addresses: root-dns.netcup.net has 46.38.225.225 and 2a03:4000:0:1::e1e1, second-dns.netcup.net has 37.221.199.199 and 2a03:4000:2:24b::c7c7, and third-dns.netcup.net has 188.68.63.68 and 2a03:4001:0:106::3f44.

Mail Servers

study.de uses one mail server — study-de.mail.eo.outlook.com.

study-de.mail.eo.outlook.com has 8 IP addresses: 52.101.68.3, 52.101.68.25, 52.101.68.36 plus 5 more.