`chemdidakt.de`

DNSSEC	⚠️ Not signed
A	202.61.232.19^{🇩🇪 netcup-AS202.61.232.0/24}
		PTR	`ae813.netcup.net`
NS	`ns11.prosite.de` ⭐
		A	2a02:8b8:704::3011^{🇩🇪 SPEEDBONE-AS2a02:8b8::/32 IPv6}
		A	217.13.192.2^{🇩🇪 SPEEDBONE-AS217.13.192.0/20 SPEEDBONE GmbH}
			PTR	`ns11.prosite.de`
NS	`ns12.prosite.de`
		A	2a02:8b8:704::3012^{🇩🇪 SPEEDBONE-AS2a02:8b8::/32 IPv6}
		A	217.13.193.2^{🇩🇪 SPEEDBONE-AS217.13.192.0/20 SPEEDBONE GmbH}
			PTR	`ns12.prosite.de`
MX	`mail.chemdidakt.de` ⭐
		A	202.61.232.21^{🇩🇪 netcup-AS202.61.232.0/24}
			PTR	`mxe815.netcup.net`
MX	`mxe815.netcup.net`⁽⁵⁰⁾
		A	2a03:4000:0:4b4:42a:98ff:fe98:3e3^{🇩🇪 netcup-AS2a03:4000::/32 NETCUP-GMBH}
			PTR	`mxe815.netcup.net`
		A	202.61.232.21^{🇩🇪 netcup-AS202.61.232.0/24}
			PTR	`mxe815.netcup.net`
TXT	`v=spf1 mx a include:_spf.webhosting.systems ~all`
SOA	`ns11.prosite.de`hostmaster@chemdidakt.de 2026-05-07 #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=1784032201

Subdomains

mail.chemdidakt.de

Same first word

chemdidakt.de

DNS History

7 records (5 active, 2 former)

●NSns11.prosite.de2015-07-01 → 2026-07-14 · 2 obs

● 2015-07-01 17:52:12
● 2026-07-14 12:37:14

●NSns12.prosite.de2015-07-01 → 2026-07-14 · 2 obs

● 2015-07-01 17:52:12
● 2026-07-14 12:37:14

●MXmail.chemdidakt.de2026-03-08 → 2026-07-14 · 2 obs

● 2026-03-08 20:43:38
● 2026-07-14 12:37:14

●MXmxe815.netcup.net2026-03-08 → 2026-07-14 · 2 obs

● 2026-03-08 20:43:38
● 2026-07-14 12:37:14

○A134.119.17.572018-12-02 → 2018-12-02 · 4 obs

○ 2017-01-28 19:32:00
● 2018-12-02 17:24:38
○ 2026-03-08 20:43:38
○ 2026-07-14 12:37:14

●A202.61.232.192026-03-08 → 2026-07-14 · 3 obs

○ 2018-12-02 17:24:38
● 2026-03-08 20:43:38
● 2026-07-14 12:37:14

○A78.46.62.412015-07-01 → 2016-06-17 · 4 obs

● 2015-07-01 17:52:12
● 2016-06-17 17:49:00
○ 2017-01-28 19:32:00
○ 2026-07-14 12:37:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	a.nic.de, z.nic.de, f.nic.de	-
chemdidakt.de	ns12.prosite.de, ns11.prosite.de	-

✅ Authoritative Response

Server:217.13.193.2

NS records: ns12.prosite.de, ns11.prosite.de

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for chemdidakt.de (unsigned zone)

⏱️ Timing

Total: 2431ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`202.61.232.19`
NS	2	`ns12.prosite.de, ns11.prosite.de`
MX	2	`mail.chemdidakt.de (pri: 10), mxe815.netcup.net (pri: 50)`
TXT	1	`v=spf1 mx a include:_spf.webhosting.syst`
SOA	1	`ns11.prosite.de hostmaster.chemdidakt.de`

Analysis

Hierarchy

The domain mail.chemdidakt.de falls under the parent chemdidakt.de.

IP Addresses

chemdidakt.de has exactly one IP address — 202.61.232.19.

mein-rennsteig.com, kimmo.de, nordblut.de plus two other host names have IP numbers in common with chemdidakt.de.

Name Servers

The NS records for chemdidakt.de delegate to ns11.prosite.de and ns12.prosite.de.

The name server configuration of chemdidakt.de is shared with other domains, for instance blitz-mailtausch.de, 4hosting.de, kumcu.com and two others.

At least some of chemdidakt.de's name servers are shared with other domains, for example bad-floersheim.de, gewinn24.eu, layer2.eu and two more.

These name servers tend to be deployed in combination with the name servers ns11.worldserver.net and ns12.worldserver.net.

ns11.prosite.de resolves to 217.13.192.2 and 2a02:8b8:704::3011. Likewise, ns12.prosite.de resolves to 217.13.193.2 and 2a02:8b8:704::3012 — two IP addresses apiece.

Mail Servers

chemdidakt.de uses two mail servers, mail.chemdidakt.de and mxe815.netcup.net.

At least some of the mail servers used by chemdidakt.de are shared with other domains: nordblut.de, dashira.de, innocad.de and two others among them.

It is common to find these mail servers used together with the mail servers fabius.kf-tool.de and mail.nordblut.de.

Host names pointing to two IP addresses:

The A records for mxe815.netcup.net return 202.61.232.21 and 2a03:4000:0:4b4:42a:98ff:fe98:3e3.

Host names resolving to a single IP address:

mail.chemdidakt.de resolves to the IP address 202.61.232.21.

mxe815.netcup.net and mail.chemdidakt.de each have 202.61.232.21 IP addresses.

chemdidakt.de - robtex.com

chemdidakt.de

de