`systemkritiker.dk`

DNSSEC	⚠️ Not signed
A	193.200.90.180^{🇩🇰 obox-networks193.200.90.0/23 Eushells.com +-------------------------------+ For abuse and security issues please contact abuse@bitguardians.com +-------------------------------+}
		PTR	`web8.e-studio.dk`
NS	`ns1.e-studio.dk` ⭐
		A	2001:67c:564:fffc::11^{🇩🇰 obox-networks2001:67c:564::/48 Sjacob Holding ApS}
			PTR	`ns1.e-studio.dk`
		A	195.242.131.5^{🇩🇰 obox-networks195.242.130.0/23 e-studio.dk +-------------------------------+ For abuse and security issues please contact abuse@bitguardians.com +-------------------------------+}
			PTR	`ns1.e-studio.dk`
NS	`ns2.e-studio.dk`
		A	2a00:1b18:2:3::2^{🇩🇰 DLX-AS2a00:1b18::/29}
			PTR	`ns2.e-studio.dk`
		A	62.69.152.34^{🇩🇰 DLX-AS62.69.152.0/21 DLX}
NS	`ns3.e-studio.dk`
		A	2001:67c:564:fffc::13^{🇩🇰 obox-networks2001:67c:564::/48 Sjacob Holding ApS}
			PTR	`ns3.e-studio.dk`
		A	193.200.90.183^{🇩🇰 obox-networks193.200.90.0/23 Eushells.com +-------------------------------+ For abuse and security issues please contact abuse@bitguardians.com +-------------------------------+}
			PTR	`ns3.e-studio.dk`
MX	`mail.systemkritiker.dk` ⭐
		A	193.200.90.180^{🇩🇰 obox-networks193.200.90.0/23 Eushells.com +-------------------------------+ For abuse and security issues please contact abuse@bitguardians.com +-------------------------------+}
			PTR	`web8.e-studio.dk`
MX	`mx4.spamfri.dk` ⭐
		A	2001:67c:564:fffd::4001^{🇩🇰 obox-networks2001:67c:564::/48 Sjacob Holding ApS}
			PTR	`mx4.spamfri.dk`
		A	193.200.91.108^{🇩🇰 obox-networks193.200.90.0/23 Eushells.com +-------------------------------+ For abuse and security issues please contact abuse@bitguardians.com +-------------------------------+}
			PTR	`mx4.spamfri.dk`
MX	`mx2.spamfri.dk`⁽²⁰⁾
		A	2001:67c:564:fffd::2001^{🇩🇰 obox-networks2001:67c:564::/48 Sjacob Holding ApS}
			PTR	`mx2.spamfri.dk`
		A	193.200.91.109^{🇩🇰 obox-networks193.200.90.0/23 Eushells.com +-------------------------------+ For abuse and security issues please contact abuse@bitguardians.com +-------------------------------+}
			PTR	`mx2.spamfri.dk`
MX	`mx3.spamfri.dk`⁽³⁰⁾
		A	2a00:1b18:2:3:fe::2^{🇩🇰 DLX-AS2a00:1b18::/29}
			PTR	`mx3.spamfri.dk`
		A	62.69.152.43^{🇩🇰 DLX-AS62.69.152.0/21 DLX}
MX	`mx1.spamfri.dk`⁽⁴⁰⁾
		A	2001:67c:564:fffd::1001^{🇩🇰 obox-networks2001:67c:564::/48 Sjacob Holding ApS}
			PTR	`mx1.spamfri.dk`
		A	195.242.131.16^{🇩🇰 obox-networks195.242.130.0/23 e-studio.dk +-------------------------------+ For abuse and security issues please contact abuse@bitguardians.com +-------------------------------+}
			PTR	`mx1.spamfri.dk`
TXT	`v=spf1 +a +mx +ip4:193.200.90.180 include:_spf.e-studio.dk ~all`
SOA	`ns1.e-studio.dk`hostmaster@mailrelay.e-studio.dk 2026-07-23 #1

`dk`

	DNSSEC	🔒 Signed (DS record present)
	NS	`b.nic.dk` ⭐
	NS	`c.nic.dk`
	NS	`h.nic.dk`
	NS	`l.nic.dk`
	NS	`s.nic.dk`
	NS	`t.nic.dk`
	TXT	`DK zone updateEpoch 1785275101localtime Tue Jul 28 23:45:01 2026gmtime Tue Ju...`
	SOA	`b.nic.dk`tech@punktum.dk serial=1785275101

Subdomains

mail.systemkritiker.dk

Same first word

systemkritiker.dk

systemkritiker.de

DNS History

17 records (9 active, 8 former)

○NSns1.dotserv.com2015-08-21 → 2017-03-20 · 4 obs

● 2015-08-21 10:58:26
● 2017-03-20 18:40:04
○ 2019-12-30 17:10:30
○ 2026-07-28 21:53:02

○NSns1.dotserv.net2015-08-21 → 2017-03-20 · 4 obs

● 2015-08-21 10:58:26
● 2017-03-20 18:40:04
○ 2019-12-30 17:10:30
○ 2026-07-28 21:53:02

●NSns1.e-studio.dk2026-03-27 → 2026-07-28 · 3 obs

○ 2019-12-30 17:10:30
● 2026-03-27 02:50:22
● 2026-07-28 21:53:02

○NSns1.hostingdk.net2019-12-30 → 2019-12-30 · 4 obs

○ 2017-03-20 18:40:04
● 2019-12-30 17:10:30
○ 2026-03-27 02:50:22
○ 2026-07-28 21:53:02

○NSns2.dotserv.com2015-08-21 → 2017-03-20 · 4 obs

● 2015-08-21 10:58:26
● 2017-03-20 18:40:04
○ 2019-12-30 17:10:30
○ 2026-07-28 21:53:02

○NSns2.dotserv.net2015-08-21 → 2017-03-20 · 4 obs

● 2015-08-21 10:58:26
● 2017-03-20 18:40:04
○ 2019-12-30 17:10:30
○ 2026-07-28 21:53:02

●NSns2.e-studio.dk2026-03-27 → 2026-07-28 · 3 obs

○ 2019-12-30 17:10:30
● 2026-03-27 02:50:22
● 2026-07-28 21:53:02

○NSns2.hostingdk.net2019-12-30 → 2019-12-30 · 4 obs

○ 2017-03-20 18:40:04
● 2019-12-30 17:10:30
○ 2026-03-27 02:50:22
○ 2026-07-28 21:53:02

●NSns3.e-studio.dk2026-03-27 → 2026-07-28 · 3 obs

○ 2019-12-30 17:10:30
● 2026-03-27 02:50:22
● 2026-07-28 21:53:02

●MXmail.systemkritiker.dk2015-08-21 → 2026-07-28 · 2 obs

● 2015-08-21 10:58:26
● 2026-07-28 21:53:02

●MXmx1.spamfri.dk2026-03-27 → 2026-07-28 · 3 obs

○ 2015-08-21 10:58:26
● 2026-03-27 02:50:22
● 2026-07-28 21:53:02

●MXmx2.spamfri.dk2026-03-27 → 2026-07-28 · 3 obs

○ 2015-08-21 10:58:26
● 2026-03-27 02:50:22
● 2026-07-28 21:53:02

●MXmx3.spamfri.dk2026-03-27 → 2026-07-28 · 3 obs

○ 2015-08-21 10:58:26
● 2026-03-27 02:50:22
● 2026-07-28 21:53:02

●MXmx4.spamfri.dk2026-03-27 → 2026-07-28 · 3 obs

○ 2015-08-21 10:58:26
● 2026-03-27 02:50:22
● 2026-07-28 21:53:02

○A167.99.37.812019-12-30 → 2019-12-30 · 4 obs

○ 2017-03-20 18:40:04
● 2019-12-30 17:10:30
○ 2026-03-27 02:50:22
○ 2026-07-28 21:53:02

○A178.20.217.182015-08-21 → 2017-03-20 · 4 obs

● 2015-08-21 10:58:26
● 2017-03-20 18:40:04
○ 2019-12-30 17:10:30
○ 2026-07-28 21:53:02

●A193.200.90.1802026-03-27 → 2026-07-28 · 3 obs

○ 2019-12-30 17:10:30
● 2026-03-27 02:50:22
● 2026-07-28 21:53:02

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dk	b.nic.dk, c.nic.dk, h.nic.dk, l.nic.dk...	-
systemkritiker.dk	ns1.e-studio.dk, ns2.e-studio.dk, ns3.e-studio.dk	-

✅ Authoritative Response

Server:193.200.90.183

NS records: ns1.e-studio.dk, ns2.e-studio.dk, ns3.e-studio.dk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for systemkritiker.dk (unsigned zone)

⏱️ Timing

Total: 1385ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`193.200.90.180`
NS	3	`ns2.e-studio.dk, ns1.e-studio.dk...`
MX	5	`mx3.spamfri.dk (pri: 30), mx2.spamfri.dk (pri: 20)...`
TXT	1	`v=spf1 +a +mx +ip4:193.200.90.180 includ`
SOA	1	`ns1.e-studio.dk hostmaster.mailrelay.e-s`

Analysis

Hierarchy

The domain mail.systemkritiker.dk falls under the parent systemkritiker.dk.

IP Addresses

systemkritiker.dk resolves to just one IP address, 193.200.90.180.

Two other host names, along with alba.dk, agaf.dk and hedwig.dk, also share IP numbers with systemkritiker.dk.

Name Servers

systemkritiker.dk carries NS records delegating to ns1.e-studio.dk, ns2.e-studio.dk and ns3.e-studio.dk.

At least some of systemkritiker.dk's name servers are shared with other domains, for example djhoumann.com, specineers.dk, gohlke.dk and two more.

ns1.e-studio.dk, ns2.e-studio.dk and ns3.e-studio.dk are three hostnames that each resolve to a pair of IP addresses: ns1.e-studio.dk to 195.242.131.5 and 2001:67c:564:fffc::11, ns2.e-studio.dk to 62.69.152.34 and 2a00:1b18:2:3::2, and ns3.e-studio.dk to 193.200.90.183 and 2001:67c:564:fffc::13.

Mail Servers

Five mail servers handle systemkritiker.dk: mx1.spamfri.dk, mx2.spamfri.dk, mx3.spamfri.dk and two others.

There is at least a partial MX overlap between systemkritiker.dk and other domains, including renel.dk, dmd.dk, grt.dk and two others.

These mail servers often co-occur with the mail servers mx4.spamfri.dk.

Host names that have two IP addresses:

mx1.spamfri.dk resolves to two addresses: 195.242.131.16 and 2001:67c:564:fffd::1001.

mx2.spamfri.dk resolves to two addresses: 193.200.91.109 and 2001:67c:564:fffd::2001.

mx3.spamfri.dk resolves to two addresses: 62.69.152.43 and 2a00:1b18:2:3:fe::2.

mx4.spamfri.dk resolves to two addresses: 193.200.91.108 and 2001:67c:564:fffd::4001.

Host names that point to one IP address:

The hostname mail.systemkritiker.dk resolves to 193.200.90.180.

systemkritiker.dk - robtex.com