`computer-kurse.de`

DNSSEC	⚠️ Not signed
A	109.237.137.223^{🇩🇪 CLOUDPIT109.237.128.0/20}
NS	`ns1.dodns.net` ⭐
		A	2001:8d8:fe:53:217:160:82:254^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns1a.dodns.net`
		A	217.160.82.254^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1a.dodns.net`
NS	`ns1a.dodns.net`
		A	2001:8d8:fe:53:217:160:82:254^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns1a.dodns.net`
		A	217.160.82.254^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1a.dodns.net`
NS	`ns2a.dodns.net`
		A	2607:f1c0:fe:53:185:132:35:254^{🇺🇸 IONOS-ANYCAST2607:f1c0:fe::/47 AS8560 global anycast services (more specific) 1&1 IONOS Inc. 701 Lee Rd, Suite 300 Chesterbrook, PA 19087 US}
			PTR	`ns2a.dodns.net`
		A	185.132.35.254^{🇩🇪 IONOS-ANYCAST185.132.32.0/22 IONOS DNSAS (eBGP DNS)}
			PTR	`ns2a.dodns.net`
MX	`mail.computer-kurse.de` ⭐
		A	109.237.137.223^{🇩🇪 CLOUDPIT109.237.128.0/20}
SOA	`ns1.dodns.net`hostmaster@dodns.net serial=5

`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=1774641364

Subdomains

mail.computer-kurse.de

Same first word

computer-kurse.de

DNS History

7 records (5 active, 2 former)

●NSns1.dodns.net2015-05-13 → 2026-03-27 · 4 obs

● 2015-05-13 16:24:52
○ 2015-10-10 02:02:34
● 2017-05-17 00:27:42
● 2026-03-27 20:19:48

●NSns1a.dodns.net2015-10-10 → 2026-03-27 · 3 obs

○ 2015-05-13 16:24:52
● 2015-10-10 02:02:34
● 2026-03-27 20:19:48

○NSns2.dodns.net2015-05-13 → 2015-05-13 · 3 obs

● 2015-05-13 16:24:52
○ 2015-10-10 02:02:34
○ 2026-03-27 20:19:48

●NSns2a.dodns.net2015-10-10 → 2026-03-27 · 3 obs

○ 2015-05-13 16:24:52
● 2015-10-10 02:02:34
● 2026-03-27 20:19:48

○NSns3.dodns.net2015-05-13 → 2015-05-13 · 3 obs

● 2015-05-13 16:24:52
○ 2015-10-10 02:02:34
○ 2026-03-27 20:19:48

●MXmail.computer-kurse.de2015-05-13 → 2026-03-27 · 2 obs

● 2015-05-13 16:24:52
● 2026-03-27 20:19:48

●A109.237.137.2232015-05-13 → 2026-03-27 · 2 obs

● 2015-05-13 16:24:52
● 2026-03-27 20:19:48

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	z.nic.de, f.nic.de, a.nic.de	-
computer-kurse.de	ns2a.dodns.net, ns1a.dodns.net	-

✅ Authoritative Response

Server:217.160.82.254

NS records: ns2a.dodns.net, ns1a.dodns.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for computer-kurse.de (unsigned zone)

⏱️ Timing

Total: 997ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`109.237.137.223`
NS	2	`ns2a.dodns.net, ns1a.dodns.net`
MX	1	`mail.computer-kurse.de (pri: 10)`
SOA	1	`ns1.dodns.net hostmaster.dodns.net`

Analysis

Hierarchy

computer-kurse.de is parent of mail.computer-kurse.de.

IP Addresses

computer-kurse.de points to a single IP: 109.237.137.223.

Other host names, for instance mail.dmb-garmisch.de, kanzlei-freiberger.de, mail.hoffmann-obergries.de, mail.immobilien-nagy.de and eventt.de share IP numbers with computer-kurse.de.

Name Servers

computer-kurse.de is delegated to three name servers: ns1.dodns.net, ns1a.dodns.net and ns2a.dodns.net.

computer-kurse.de at least partially shares its name servers with other domains, for instance tegernsee-tagung.de, web-hosting.de, glasfaser-kassel.de, tim-jaster.net and rising-systems.com.

Host names with two IP numbers:

ns1.dodns.net points to: 2001:8d8:fe:53:217:160:82:254 and 217.160.82.254.

ns1a.dodns.net points to: 2001:8d8:fe:53:217:160:82:254 and 217.160.82.254.

ns2a.dodns.net points to: 2607:f1c0:fe:53:185:132:35:254 and 185.132.35.254.

Host names pointing to 2001:8d8:fe:53:217:160:82:254: ns1.dodns.net and ns1a.dodns.net.

Host names pointing to 217.160.82.254: ns1.dodns.net and ns1a.dodns.net.

Mail Servers

computer-kurse.de is served by a single mail server, mail.computer-kurse.de.

mail.computer-kurse.de points to IP number 109.237.137.223.

computer-kurse.de - robtex.com