opencourseware.de - dns.ninja

`opencourseware.de`

DNSSEC	⚠️ Not signed
A	2001:8d8:1000:f08a:7250:f975:41d0:833^{🇩🇪 IONOS-AS2001:8d8::/32 DE-IONOS-20020910}
		PTR	`kundenserver.de`
A	217.160.122.120^{🇩🇪 IONOS-AS217.160.0.0/16 IONOS-PA-3}
NS	`ns1024.ui-dns.com` ⭐
		A	2001:8d8:fe:53:0:d9a0:5218:100^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns1024.ui-dns.com`
		A	217.160.82.24^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1024.ui-dns.com`
NS	`ns1024.ui-dns.biz`
		A	2001:8d8:fe:53:0:d9a0:5118:100^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns1024.ui-dns.biz`
		A	217.160.81.24^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1024.ui-dns.biz`
NS	`ns1024.ui-dns.de`
		A	2001:8d8:fe:53:0:d9a0:5018:100^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns1024.ui-dns.de`
		A	217.160.80.24^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1024.ui-dns.de`
NS	`ns1024.ui-dns.org`
		A	2001:8d8:fe:53:0:d9a0:5318:100^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns1024.ui-dns.org`
		A	217.160.83.24^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1024.ui-dns.org`
MX	`mx00.ionos.de` ⭐
		A	212.227.15.41^{🇩🇪 IONOS-AS212.227.0.0/16 IONOS-PA-2}
			PTR	`mx00.kundenserver.de`
MX	`mx01.ionos.de` ⭐
		A	217.72.192.67^{🇩🇪 IONOS-AS217.72.192.0/20 Web.de}
			PTR	`mx01.kundenserver.de`
TXT	`v=spf1 include:_spf-eu.ionos.com ~all`
SOA	`ns1024.ui-dns.com`hostmaster@1und1.de 2016-07-17 #3

`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=1782943993

Same first word

opencourseware.net

opencourseware.eu

opencourseware.com

opencourseware.co.uk

opencourseware.de

opencourseware.me

opencourseware.online

opencourseware.org

Similar names

opensourceware.net

opensourceware.com

opensourcewear.com

DNS History

14 records (8 active, 6 former)

●NSns1024.ui-dns.biz2026-03-29 → 2026-07-01 · 3 obs

○ 2017-11-07 09:55:32
● 2026-03-29 11:33:30
● 2026-07-01 22:38:56

●NSns1024.ui-dns.com2026-03-29 → 2026-07-01 · 3 obs

○ 2017-11-07 09:55:32
● 2026-03-29 11:33:30
● 2026-07-01 22:38:56

●NSns1024.ui-dns.de2026-03-29 → 2026-07-01 · 3 obs

○ 2017-11-07 09:55:32
● 2026-03-29 11:33:30
● 2026-07-01 22:38:56

●NSns1024.ui-dns.org2026-03-29 → 2026-07-01 · 3 obs

○ 2017-11-07 09:55:32
● 2026-03-29 11:33:30
● 2026-07-01 22:38:56

○NSns65.1und1.de2015-07-16 → 2017-11-07 · 4 obs

● 2015-07-16 04:57:52
● 2017-11-07 09:55:32
○ 2026-03-29 11:33:30
○ 2026-07-01 22:38:56

○NSns66.1und1.de2015-07-16 → 2017-11-07 · 4 obs

● 2015-07-16 04:57:52
● 2017-11-07 09:55:32
○ 2026-03-29 11:33:30
○ 2026-07-01 22:38:56

●MXmx00.ionos.de2026-03-29 → 2026-07-01 · 3 obs

○ 2017-11-07 09:55:32
● 2026-03-29 11:33:30
● 2026-07-01 22:38:56

○MXmx00.kundenserver.de2015-07-16 → 2017-11-07 · 4 obs

● 2015-07-16 04:57:52
● 2017-11-07 09:55:32
○ 2026-03-29 11:33:30
○ 2026-07-01 22:38:56

●MXmx01.ionos.de2026-03-29 → 2026-07-01 · 3 obs

○ 2017-11-07 09:55:32
● 2026-03-29 11:33:30
● 2026-07-01 22:38:56

○MXmx01.kundenserver.de2015-07-16 → 2017-11-07 · 4 obs

● 2015-07-16 04:57:52
● 2017-11-07 09:55:32
○ 2026-03-29 11:33:30
○ 2026-07-01 22:38:56

●A2001:8d8:1000:f08a:7250:f975:41d0:8332016-12-07 → 2026-07-01 · 3 obs

○ 2016-03-24 00:35:26
● 2016-12-07 16:31:26
● 2026-07-01 22:38:56

○A2001:8d8:1000:f08a:ec12:85ca:dcdc:a8262015-07-16 → 2016-03-24 · 4 obs

● 2015-07-16 04:57:52
● 2016-03-24 00:35:26
○ 2016-12-07 16:31:26
○ 2026-07-01 22:38:56

●A217.160.122.1202016-12-07 → 2026-07-01 · 3 obs

○ 2016-03-24 00:35:26
● 2016-12-07 16:31:26
● 2026-07-01 22:38:56

○A82.165.189.2102015-07-16 → 2016-03-24 · 4 obs

● 2015-07-16 04:57:52
● 2016-03-24 00:35:26
○ 2016-12-07 16:31:26
○ 2026-07-01 22:38:56

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	z.nic.de, a.nic.de, f.nic.de	-
opencourseware.de	ns1024.ui-dns.de, ns1024.ui-dns.biz, ns1024.ui-dns.com, ns1024.ui-dns.org	-

✅ Authoritative Response

Server:217.160.83.24

NS records: ns1024.ui-dns.de, ns1024.ui-dns.biz, ns1024.ui-dns.com, ns1024.ui-dns.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for opencourseware.de (unsigned zone)

⏱️ Timing

Total: 1262ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`217.160.122.120`
AAAA	1	`2001:8d8:1000:f08a:7250:f975:41d0:833`
NS	4	`ns1024.ui-dns.com, ns1024.ui-dns.org...`
MX	2	`mx01.ionos.de (pri: 10), mx00.ionos.de (pri: 10)`
TXT	1	`v=spf1 include:_spf-eu.ionos.com ~all`
SOA	1	`ns1024.ui-dns.com hostmaster.1und1.de`

Analysis

IP Addresses

opencourseware.de has two IP addresses: 217.160.122.120 and 2001:8d8:1000:f08a:7250:f975:41d0:833

Two other host names, along with dotzauerlutz.de, contoclear.com and ertune.de, also share IP numbers with opencourseware.de.

Name Servers

The NS records for opencourseware.de point to four name servers: ns1024.ui-dns.biz, ns1024.ui-dns.com, ns1024.ui-dns.de and ns1024.ui-dns.org.

The name servers of opencourseware.de overlap at least partially with those of other domains — among them lens-versand.com, assbang.com, nejite.com and two more.

These name servers commonly co-occur with the name servers ns1022.ui-dns.org, ns1035.ui-dns.org, ns1028.ui-dns.de and ns1110.ui-dns.org.

Each of the four hosts ns1024.ui-dns.biz, ns1024.ui-dns.com, ns1024.ui-dns.de and ns1024.ui-dns.org has two IP addresses. ns1024.ui-dns.biz points to 217.160.81.24 and 2001:8d8:fe:53:0:d9a0:5118:100. ns1024.ui-dns.com points to 217.160.82.24 and 2001:8d8:fe:53:0:d9a0:5218:100. ns1024.ui-dns.de points to 217.160.80.24 and 2001:8d8:fe:53:0:d9a0:5018:100. ns1024.ui-dns.org points to 217.160.83.24 and 2001:8d8:fe:53:0:d9a0:5318:100.

Mail Servers

opencourseware.de is served by two mail servers, mx00.ionos.de and mx01.ionos.de.

Among the domains sharing a mail server setup with opencourseware.de are ausderasche.de, xyloid.de, portrayed.de and two others.

Both mx00.ionos.de and mx01.ionos.de have a single IP address each — mx00.ionos.de resolves to 212.227.15.41 while mx01.ionos.de resolves to 217.72.192.67.