opensource-security.de - dns.ninja

opensource-security.de

DNSSEC🔒 Signed (DS record present)
A91.213.36.9🇩🇪 OST-SPE91.213.36.0/24 OpenSource Training Ralf Spenneberg
NSns3.nohup.info ⭐
A91.213.36.32🇩🇪 OST-SPE91.213.36.0/24 OpenSource Training Ralf Spenneberg
PTRns3.nohup.info
NSns1.nohup.info
A91.213.36.8🇩🇪 OST-SPE91.213.36.0/24 OpenSource Training Ralf Spenneberg
NSns2.nohup.info
A91.213.36.50🇩🇪 OST-SPE91.213.36.0/24 OpenSource Training Ralf Spenneberg
PTRns2.nohup.info
NSns5.nohup.info
A85.214.194.4🇩🇪 STRATO85.214.0.0/15 AG
PTRh3004703.stratoserver.net
MXxchg.spenneberg.net ⭐
A2001:67c:24:0:d845:ccff:fe0d:cd55🇩🇪 OST-SPE2001:67c:24::/48 OpenSource Training Ralf Spenneberg
PTRxchg.spenneberg.net
A91.213.36.228🇩🇪 OST-SPE91.213.36.0/24 OpenSource Training Ralf Spenneberg
PTRxchg3.spenneberg.net
TXTv=spf1 +mx ~all
SOAns3.nohup.infodns@nohup.info 2026-07-23 #0

de

DNSSEC🔒 Signed (DS record present)
NSf.nic.de ⭐
NSa.nic.de
NSl.de.net ⚠️ Not in parent delegation
NSn.de.net ⚠️ Not in parent delegation
NSs.de.net ⚠️ Not in parent delegation
NSz.nic.de
SOAf.nic.dedns-operations@denic.de serial=1784965569

Same first word

opensource-security.de

DNS History

13 records (6 active, 7 former)

20162017201820192020202120222023202420252026NSns1.nohup.infons2.nohup.infons3.nohup.infons5.nohup.infons0.spenneberg.netns1.spenneberg.netns2.spenneberg.netns3.spenneberg.netns4.nohup.infoMXxchg.spenneberg.netmx.spenneberg.netA91.213.36.982.165.40.21
○NSns0.spenneberg.net2015-08-17 → 2015-12-06 · 4 obs
● 2015-08-17 13:23:06
● 2015-12-06 15:27:40
○ 2016-03-13 08:30:36
○ 2026-07-25 08:08:02
●NSns1.nohup.info2026-02-14 → 2026-07-25 · 3 obs
○ 2020-01-11 06:01:16
● 2026-02-14 23:35:58
● 2026-07-25 08:08:02
○NSns1.spenneberg.net2016-03-13 → 2020-01-11 · 5 obs
○ 2015-12-06 15:27:40
● 2016-03-13 08:30:36
● 2020-01-11 06:01:16
○ 2026-02-14 23:35:58
○ 2026-07-25 08:08:02
●NSns2.nohup.info2026-02-14 → 2026-07-25 · 3 obs
○ 2020-01-11 06:01:16
● 2026-02-14 23:35:58
● 2026-07-25 08:08:02
○NSns2.spenneberg.net2016-03-13 → 2020-01-11 · 5 obs
○ 2015-12-06 15:27:40
● 2016-03-13 08:30:36
● 2020-01-11 06:01:16
○ 2026-02-14 23:35:58
○ 2026-07-25 08:08:02
●NSns3.nohup.info2026-02-14 → 2026-07-25 · 3 obs
○ 2020-01-11 06:01:16
● 2026-02-14 23:35:58
● 2026-07-25 08:08:02
○NSns3.spenneberg.net2015-08-17 → 2020-01-11 · 4 obs
● 2015-08-17 13:23:06
● 2020-01-11 06:01:16
○ 2026-02-14 23:35:58
○ 2026-07-25 08:08:02
○NSns4.nohup.info2016-03-13 → 2020-01-11 · 5 obs
○ 2015-12-06 15:27:40
● 2016-03-13 08:30:36
● 2020-01-11 06:01:16
○ 2026-02-14 23:35:58
○ 2026-07-25 08:08:02
●NSns5.nohup.info2026-02-14 → 2026-07-25 · 3 obs
○ 2020-01-11 06:01:16
● 2026-02-14 23:35:58
● 2026-07-25 08:08:02
○MXmx.spenneberg.net2015-08-17 → 2016-03-13 · 4 obs
● 2015-08-17 13:23:06
● 2016-03-13 08:30:36
○ 2016-07-13 13:52:44
○ 2026-07-25 08:08:02
●MXxchg.spenneberg.net2015-08-17 → 2026-07-25 · 2 obs
● 2015-08-17 13:23:06
● 2026-07-25 08:08:02
○A82.165.40.212015-08-17 → 2015-12-06 · 4 obs
● 2015-08-17 13:23:06
● 2015-12-06 15:27:40
○ 2016-03-13 08:30:36
○ 2026-07-25 08:08:02
●A91.213.36.92016-03-13 → 2026-07-25 · 3 obs
○ 2015-12-06 15:27:40
● 2016-03-13 08:30:36
● 2026-07-25 08:08:02

🔍 DNS Trace

Analysis

IP Addresses

opensource-security.de resolves to one IP address: 91.213.36.9.

wes-t.de, opensource-training.net, nor-d.de and two other host names share IP numbers with opensource-security.de.

Name Servers

The authoritative name servers for opensource-security.de are ns1.nohup.info, ns2.nohup.info, ns3.nohup.info and ns5.nohup.info.

opensource-security.de shares at least some of its name servers with other domains, including ostd.de, opensource-training.org, kolab-training.org and two others.

These name servers are frequently paired with the name servers ns4.nohup.info and ns0.nohup.info.

Each of the four hosts ns1.nohup.info, ns2.nohup.info, ns3.nohup.info and ns5.nohup.info points to a single IP address — ns1.nohup.info points to 91.213.36.8, ns2.nohup.info points to 91.213.36.50, ns3.nohup.info points to 91.213.36.32 and ns5.nohup.info points to 85.214.194.4.

Mail Servers

Mail for opensource-security.de is handled by a single mail server, xchg.spenneberg.net.

opensource-security.de uses an identical mail server configuration to several other domains — among them secure-bsd.de, spenneberg.info, opensource-consulting.org and two more.

xchg.spenneberg.net points to two IP addresses: 91.213.36.228 and 2001:67c:24:0:d845:ccff:fe0d:cd55.