opensource-training.net - dns.ninja

`opensource-training.net`

DNSSEC	⚠️ Not signed
NS	`ns1.nohup.info` ⚠️ Not in zone NS records
		A	91.213.36.8^{🇩🇪 OST-SPE91.213.36.0/24 OpenSource Training Ralf Spenneberg}
			PTR	`ns0.spenneberg.net`
NS	`ns2.nohup.info` ⚠️ Not in zone NS records
		A	91.213.36.50^{🇩🇪 OST-SPE91.213.36.0/24 OpenSource Training Ralf Spenneberg}
			PTR	`ns2.nohup.info`
NS	`ns3.nohup.info` ⚠️ Not in zone NS records
		A	91.213.36.32^{🇩🇪 OST-SPE91.213.36.0/24 OpenSource Training Ralf Spenneberg}
			PTR	`ns3.nohup.info`
NS	`ns5.nohup.info` ⚠️ Not in zone NS records
		A	85.214.194.4^{🇩🇪 STRATO85.214.0.0/15 AG}
			PTR	`h3004703.stratoserver.net`

`net`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1784988242

Previously MX for

opensource-training.net

Same first word

opensource-training.com

opensource-training.net

opensource-training.org

opensource-training.de

DNS History

16 records (4 active, 12 former)

○NSns0.spenneberg.net2015-08-12 → 2017-05-17 · 7 obs

○ 2007-09-22 18:13:54
● 2015-08-12 10:41:38
● 2016-01-26 18:45:22
○ 2016-02-20 00:33:42
● 2017-05-17 00:44:22
○ 2026-02-14 23:35:58
○ 2026-07-25 14:33:26

●NSns1.nohup.info2026-02-14 → 2026-07-25 · 3 obs

○ 2017-05-17 00:44:22
● 2026-02-14 23:35:58
● 2026-07-25 14:33:26

●NSns2.nohup.info2026-02-14 → 2026-07-25 · 3 obs

○ 2017-05-17 00:44:22
● 2026-02-14 23:35:58
● 2026-07-25 14:33:26

●NSns3.nohup.info2026-02-14 → 2026-07-25 · 3 obs

○ 2017-05-17 00:44:22
● 2026-02-14 23:35:58
● 2026-07-25 14:33:26

○NSns3.spenneberg.net2015-08-12 → 2017-05-17 · 5 obs

○ 2007-09-22 18:13:54
● 2015-08-12 10:41:38
● 2017-05-17 00:44:22
○ 2026-02-14 23:35:58
○ 2026-07-25 14:33:26

○NSns4.nohup.info2016-02-20 → 2017-05-17 · 5 obs

○ 2016-01-26 18:45:22
● 2016-02-20 00:33:42
● 2017-05-17 00:44:22
○ 2026-02-14 23:35:58
○ 2026-07-25 14:33:26

○NSns49.1und1.de2007-09-22 → 2007-09-22 · 3 obs

● 2007-09-22 18:13:54
○ 2015-08-12 10:41:38
○ 2026-07-25 14:33:26

●NSns5.nohup.info2026-02-14 → 2026-07-25 · 3 obs

○ 2017-05-17 00:44:22
● 2026-02-14 23:35:58
● 2026-07-25 14:33:26

○NSns50.1und1.de2007-09-22 → 2007-09-22 · 3 obs

● 2007-09-22 18:13:54
○ 2015-08-12 10:41:38
○ 2026-07-25 14:33:26

○MXmx.spenneberg.net2015-08-12 → 2016-04-20 · 5 obs

○ 2007-09-22 18:13:54
● 2015-08-12 10:41:38
● 2016-04-20 01:50:38
○ 2016-08-02 21:03:44
○ 2026-07-25 14:33:26

○MXmx01.kundenserver.de2007-09-22 → 2007-09-22 · 3 obs

● 2007-09-22 18:13:54
○ 2015-08-12 10:41:38
○ 2026-07-25 14:33:26

○MXopensource-training.net2007-09-22 → 2007-09-22 · 3 obs

● 2007-09-22 18:13:54
○ 2015-08-12 10:41:38
○ 2026-07-25 14:33:26

○MXxchg.spenneberg.net2016-08-02 → 2017-05-17 · 4 obs

○ 2016-04-20 01:50:38
● 2016-08-02 21:03:44
● 2017-05-17 00:44:22
○ 2026-07-25 14:33:26

○A87.106.54.2212007-09-22 → 2007-09-22 · 3 obs

● 2007-09-22 18:13:54
○ 2015-08-12 10:41:38
○ 2026-07-25 14:33:26

○A91.213.36.112015-08-12 → 2017-05-17 · 5 obs

○ 2007-09-22 18:13:54
● 2015-08-12 10:41:38
● 2017-05-17 00:44:22
○ 2026-02-14 23:35:58
○ 2026-07-25 14:33:26

○A91.213.36.92026-02-14 → 2026-02-14 · 3 obs

○ 2017-05-17 00:44:22
● 2026-02-14 23:35:58
○ 2026-07-25 14:33:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
net	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
opensource-training.net	ns3.nohup.info, ns2.nohup.info, ns1.nohup.info, ns5.nohup.info	-

✅ Authoritative Response

Server:85.214.194.4

NS records: ns3.nohup.info, ns2.nohup.info, ns1.nohup.info, ns5.nohup.info

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 2693ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`91.213.36.9`
NS	4	`ns5.nohup.info, ns1.nohup.info...`
MX	1	`xchg.spenneberg.net (pri: 5)`
TXT	1	`v=spf1 +mx ~all`
SOA	1	`ns3.nohup.info dns.nohup.info`

Analysis

Name Servers

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

At least some of opensource-training.net's name servers are shared with other domains, for example kolab-training.org, diealtepost.de, 36.213.91.in-addr.arpa and two more.

These name servers tend to be deployed in combination 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.