`bigdata-usergroup.de`

DNSSEC	⚠️ Not signed
A	88.198.66.91^{🇩🇪 Hetzner88.198.0.0/16 HETZNER-RZ-NBG-BLK4}
		PTR	`bexamed.medien-space.de`
NS	`ns1.first-ns.de` ⭐
		A	2a01:4f8:0:a101::a:1^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
			PTR	`ns1.first-ns.de`
		A	213.239.242.238^{🇩🇪 Hetzner213.239.192.0/18 HETZNER-RZ-NBG-BLK2}
			PTR	`ns1.first-ns.de`
NS	`robotns2.second-ns.de`
		A	2a01:4f8:0:1::5ddc:2^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
			PTR	`robotns2.second-ns.de`
		A	213.133.100.103^{🇩🇪 Hetzner213.133.96.0/19 HETZNER-RZ-NBG-BLK1}
			PTR	`robotns2.second-ns.de`
NS	`robotns3.second-ns.com`
		A	2001:67c:192c::add:a3^{🇩🇪 NORIS-NETWORK2001:67c:192c::/48}
			PTR	`robotns3.second-ns.com`
		A	193.47.99.3^{🇩🇪 NORIS-NETWORK193.47.99.0/24}
			PTR	`robotns3.second-ns.com`
MX	`mail.bigdata-usergroup.de` ⭐
		A	88.198.66.91^{🇩🇪 Hetzner88.198.0.0/16 HETZNER-RZ-NBG-BLK4}
			PTR	`bexamed.medien-space.de`
SOA	`ns1.first-ns.de`dns@hetzner.com 2026-04-14 #0

`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=1786073864

Subdomains

mail.bigdata-usergroup.de

Same first word

bigdata-usergroup.de

DNS History

6 records (5 active, 1 former)

●NSns1.first-ns.de2015-07-26 → 2026-08-07 · 2 obs

● 2015-07-26 02:10:16
● 2026-08-07 03:55:10

●NSrobotns2.second-ns.de2015-07-26 → 2026-08-07 · 2 obs

● 2015-07-26 02:10:16
● 2026-08-07 03:55:10

●NSrobotns3.second-ns.com2015-07-26 → 2026-08-07 · 2 obs

● 2015-07-26 02:10:16
● 2026-08-07 03:55:10

●MXmail.bigdata-usergroup.de2015-07-26 → 2026-08-07 · 2 obs

● 2015-07-26 02:10:16
● 2026-08-07 03:55:10

○A176.9.77.2012015-07-26 → 2015-12-01 · 4 obs

● 2015-07-26 02:10:16
● 2015-12-01 23:21:52
○ 2016-03-08 08:59:18
○ 2026-08-07 03:55:10

●A88.198.66.912016-03-08 → 2026-08-07 · 3 obs

○ 2015-12-01 23:21:52
● 2016-03-08 08:59:18
● 2026-08-07 03:55:10

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	a.nic.de, f.nic.de, z.nic.de	-
bigdata-usergroup.de	robotns2.second-ns.de, robotns3.second-ns.com, ns1.first-ns.de	-

✅ Authoritative Response

Server:193.47.99.3

NS records: robotns2.second-ns.de, robotns3.second-ns.com, ns1.first-ns.de

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for bigdata-usergroup.de (unsigned zone)

⏱️ Timing

Total: 1048ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`88.198.66.91`
NS	3	`ns1.first-ns.de, robotns2.second-ns.de...`
MX	1	`mail.bigdata-usergroup.de (pri: 10)`
SOA	1	`ns1.first-ns.de dns.hetzner.com`

Analysis

Hierarchy

The domain mail.bigdata-usergroup.de falls under the parent bigdata-usergroup.de.

IP Addresses

bigdata-usergroup.de has exactly one IP address — 88.198.66.91.

Other host names, among them bexamed.medien-space.de and mail.bigdata-usergroup.de, have IP numbers in common with bigdata-usergroup.de.

Name Servers

bigdata-usergroup.de is delegated to three name servers: robotns3.second-ns.com, ns1.first-ns.de and robotns2.second-ns.de.

At least some of bigdata-usergroup.de's name servers are shared with other domains, for example 4w9.org, hotel-la-forge.be, uiobservatory.com and two more.

It is common for these name servers to be used in conjunction with the name servers hydrogen.ns.hetzner.com, oxygen.ns.hetzner.com and helium.ns.hetzner.de.

robotns3.second-ns.com, ns1.first-ns.de and robotns2.second-ns.de each resolve to two IP addresses: robotns3.second-ns.com resolves to 193.47.99.3 and 2001:67c:192c::add:a3; ns1.first-ns.de resolves to 213.239.242.238 and 2a01:4f8:0:a101::a:1; robotns2.second-ns.de resolves to 213.133.100.103 and 2a01:4f8:0:1::5ddc:2.

Mail Servers

bigdata-usergroup.de uses one mail server — mail.bigdata-usergroup.de.

mail.bigdata-usergroup.de resolves to a single IP number: 88.198.66.91.

bigdata-usergroup.de - robtex.com