`open-source-elearning.de`

DNSSEC	⚠️ Not signed
A	91.233.85.20^{🇩🇪 IPB91.233.84.0/22 -1blu-PI}
		PTR	`cluster.b90.w3w.de`
NS	`ns1.prodns.de` ⭐
		A	13.248.213.54^{🇺🇸 Amazon13.248.208.0/20}
			PTR	`a93aba133e46b51cd.awsglobalaccelerator.com`
NS	`ns2.prodns.de`
		A	87.238.197.120^{🇩🇪 EVANZOAS87.238.192.0/21 DE-EVANZO-MK}
			PTR	`120.197.238.87.in-addr.arpa`
NS	`ns3.prodns.de`
		A	136.243.102.23^{🇩🇪 Hetzner136.243.0.0/16 HETZNER-RZ-BLK-ERX3}
			PTR	`23.102.243.136.in-addr.arpa`
MX	`mail.open-source-elearning.de` ⭐
		A	91.233.87.22^{🇩🇪 IPB91.233.84.0/22 -1blu-PI}
			PTR	`mx2bln1.prossl.de`
TXT	`v=spf1 a mx ip4:91.233.84.0/22 ~all`
SOA	`ns1.prodns.de`dnsmaster@prodns.de 2021-01-28 #1

`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=1777273180

Subdomains

mail.open-source-elearning.de

Same first word

open-source-elearning.de

DNS History

5 records (5 active, 0 former)

●NSns1.prodns.de2015-08-14 → 2026-04-27 · 2 obs

● 2015-08-14 06:25:40
● 2026-04-27 07:28:28

●NSns2.prodns.de2015-08-14 → 2026-04-27 · 2 obs

● 2015-08-14 06:25:40
● 2026-04-27 07:28:28

●NSns3.prodns.de2015-08-14 → 2026-04-27 · 2 obs

● 2015-08-14 06:25:40
● 2026-04-27 07:28:28

●MXmail.open-source-elearning.de2015-08-14 → 2026-04-27 · 2 obs

● 2015-08-14 06:25:40
● 2026-04-27 07:28:28

●A91.233.85.202015-08-14 → 2026-04-27 · 2 obs

● 2015-08-14 06:25:40
● 2026-04-27 07:28:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	a.nic.de, f.nic.de, z.nic.de	-
open-source-elearning.de	ns2.prodns.de, ns3.prodns.de, ns1.prodns.de	2 records

✅ Authoritative Response

Server:87.238.197.120

NS records: ns2.prodns.de, ns3.prodns.de, ns1.prodns.de

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for open-source-elearning.de (unsigned zone)

⏱️ Timing

Total: 938ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`91.233.85.20`
NS	3	`ns2.prodns.de, ns3.prodns.de...`
MX	1	`mail.open-source-elearning.de (pri: 10)`
TXT	1	`v=spf1 a mx ip4:91.233.84.0/22 ~all`
SOA	1	`ns1.prodns.de dnsmaster.prodns.de`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1.prodns.de, ns3.prodns.de)

Analysis

Hierarchy

open-source-elearning.de is the parent of mail.open-source-elearning.de.

IP Addresses

open-source-elearning.de resolves to a single IP address: 91.233.85.20.

Other host names including aroos.at, www.betriebsberater-nrw.de, concept-consulting.eu, letsgo-azubi.de and listelorch.de share IP numbers with open-source-elearning.de.

Name Servers

open-source-elearning.de is delegated to three name servers: ns1.prodns.de, ns2.prodns.de and ns3.prodns.de.

open-source-elearning.de at least partially shares name servers with other domains, including sodgom-project.org, lamodalady.com, hasekind.de, kanzlei-pfeifer.de and myspeedware.net.

these name servers are commonly used with ns2.prodns.eu, ns5.prodns.de, ns4.prodns.eu and ns4.prodns.de.

Hostnames with a single IP:

ns1.prodns.de points to: 13.248.213.54.

ns2.prodns.de points to: 87.238.197.120.

ns3.prodns.de points to: 136.243.102.23.

Mail Servers

open-source-elearning.de is handled by a single mail server, mail.open-source-elearning.de.

mail.open-source-elearning.de points to a single IP: 91.233.87.22.

open-source-elearning.de - robtex.com