open-source.dk - dns.ninja

open-source.dk

DNSSEC⚠️ Not signed
A204.168.134.186
PTRstatic.186.134.168.204.clients.your-server.de
NShydrogen.ns.hetzner.com ⭐
A2a01:4f8:0:1::add:1098🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK
PTRhydrogen.ns.hetzner.com
A213.133.100.98🇩🇪 Hetzner213.133.96.0/19 HETZNER-RZ-NBG-BLK1
PTRhydrogen.ns.hetzner.com
NShelium.ns.hetzner.de
A2001:67c:192c::add:5🇩🇪 NORIS-NETWORK2001:67c:192c::/48
PTRhelium.ns.hetzner.de
A193.47.99.5🇩🇪 NORIS-NETWORK193.47.99.0/24
PTRhelium.ns.hetzner.de
NSoxygen.ns.hetzner.com
A2a01:4f8:0:1::add:2992🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK
PTRoxygen.ns.hetzner.com
A88.198.229.192🇩🇪 Hetzner88.198.0.0/16 HETZNER-RZ-NBG-BLK4
PTRoxygen.ns.hetzner.com
MXshrek.krogh.cc ⭐
A87.61.100.231🇩🇰 TDC87.61.0.0/17
PTR0x573d64e7.static.cust.fastspeed.dk
SOAhydrogen.ns.hetzner.comdns@hetzner.com 2026-03-18 #7

dk

DNSSEC🔒 Signed (DS record present)
NSb.nic.dk ⭐
NSc.nic.dk
NSh.nic.dk
NSl.nic.dk
NSs.nic.dk
NSt.nic.dk
TXTDK zone updateEpoch 1785070261localtime Sun Jul 26 14:51:01 2026gmtime Sun Ju...
SOAb.nic.dktech@punktum.dk serial=1785070441

Same first word

open-source.online
open-source.de
open-source.energy
open-source.co.jp
open-source.us
open-source.guide
open-source.jp
open-source.co.uk
open-source.at
open-source.co.at
open-source.rs
open-source.net
open-source.guru
open-source.nl
open-source.technology
open-source.io
open-source.in
open-source.com
open-source.me
open-source.support
open-source.mobi
open-source.cn
open-source.fr
open-source.co
open-source.org
open-source.solutions
open-source.dk
open-source.eu
open-source.ru
open-source.info
open-source.now.sh

Similar names

open-course.com
source-open.de
open-course.net

DNS History

18 records (5 active, 13 former)

20162017201820192020202120222023202420252026NShelium.ns.hetzner.dehydrogen.ns.hetzner.comoxygen.ns.hetzner.comns-1.awsdns-00.comns-1008.awsdns-62.netns-1322.awsdns-37.orgns-1776.awsdns-30.co.ukns.linuxsystems.dkns1.gratisdns.dkns2.gratisdns.dkns3.gratisdns.dkns4.gratisdns.dkns5.gratisdns.dkMXshrek.krogh.cckrogh.ccA204.168.134.186188.178.198.21062.66.187.220
●NShelium.ns.hetzner.de2026-06-10 → 2026-07-26 · 3 obs
○ 2017-07-10 12:25:42
● 2026-06-10 04:40:30
● 2026-07-26 12:57:02
●NShydrogen.ns.hetzner.com2026-06-10 → 2026-07-26 · 3 obs
○ 2017-07-10 12:25:42
● 2026-06-10 04:40:30
● 2026-07-26 12:57:02
○NSns-1.awsdns-00.com2026-06-10 → 2026-07-26 · 2 obs
○ 2026-06-10 04:40:30
○ 2026-07-26 12:57:02
○NSns-1008.awsdns-62.net2026-06-10 → 2026-07-26 · 2 obs
○ 2026-06-10 04:40:30
○ 2026-07-26 12:57:02
○NSns-1322.awsdns-37.org2026-06-10 → 2026-07-26 · 2 obs
○ 2026-06-10 04:40:30
○ 2026-07-26 12:57:02
○NSns-1776.awsdns-30.co.uk2026-06-10 → 2026-07-26 · 2 obs
○ 2026-06-10 04:40:30
○ 2026-07-26 12:57:02
○NSns.linuxsystems.dk2015-07-26 → 2017-07-10 · 4 obs
● 2015-07-26 00:21:10
● 2017-07-10 12:25:42
○ 2026-06-10 04:40:30
○ 2026-07-26 12:57:02
○NSns1.gratisdns.dk2015-07-26 → 2017-07-10 · 4 obs
● 2015-07-26 00:21:10
● 2017-07-10 12:25:42
○ 2026-06-10 04:40:30
○ 2026-07-26 12:57:02
○NSns2.gratisdns.dk2015-07-26 → 2017-07-10 · 4 obs
● 2015-07-26 00:21:10
● 2017-07-10 12:25:42
○ 2026-06-10 04:40:30
○ 2026-07-26 12:57:02
○NSns3.gratisdns.dk2015-07-26 → 2017-07-10 · 4 obs
● 2015-07-26 00:21:10
● 2017-07-10 12:25:42
○ 2026-06-10 04:40:30
○ 2026-07-26 12:57:02
○NSns4.gratisdns.dk2015-07-26 → 2017-07-10 · 4 obs
● 2015-07-26 00:21:10
● 2017-07-10 12:25:42
○ 2026-06-10 04:40:30
○ 2026-07-26 12:57:02
○NSns5.gratisdns.dk2015-07-26 → 2017-07-10 · 4 obs
● 2015-07-26 00:21:10
● 2017-07-10 12:25:42
○ 2026-06-10 04:40:30
○ 2026-07-26 12:57:02
●NSoxygen.ns.hetzner.com2026-06-10 → 2026-07-26 · 3 obs
○ 2017-07-10 12:25:42
● 2026-06-10 04:40:30
● 2026-07-26 12:57:02
○MXkrogh.cc2015-07-26 → 2017-07-10 · 4 obs
● 2015-07-26 00:21:10
● 2017-07-10 12:25:42
○ 2026-06-10 04:40:30
○ 2026-07-26 12:57:02
●MXshrek.krogh.cc2026-06-10 → 2026-07-26 · 3 obs
○ 2017-07-10 12:25:42
● 2026-06-10 04:40:30
● 2026-07-26 12:57:02
○A188.178.198.2102015-07-26 → 2016-07-02 · 4 obs
● 2015-07-26 00:21:10
● 2016-07-02 13:46:52
○ 2017-07-10 12:25:42
○ 2026-07-26 12:57:02
●A204.168.134.1862026-06-10 → 2026-07-26 · 3 obs
○ 2017-07-10 12:25:42
● 2026-06-10 04:40:30
● 2026-07-26 12:57:02
○A62.66.187.2202017-07-10 → 2017-07-10 · 4 obs
○ 2016-07-02 13:46:52
● 2017-07-10 12:25:42
○ 2026-06-10 04:40:30
○ 2026-07-26 12:57:02

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
dkb.nic.dk, h.nic.dk, t.nic.dk, c.nic.dk...-
open-source.dkhelium.ns.hetzner.de, oxygen.ns.hetzner.com, hydrogen.ns.hetzner.com-

✅ Authoritative Response

Server:213.133.100.98

NS records: helium.ns.hetzner.de, oxygen.ns.hetzner.com, hydrogen.ns.hetzner.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for open-source.dk (unsigned zone)

⏱️ Timing

Total: 3134ms | Queries: -

📄 Records

TypeCountSample Data
A1204.168.134.186
NS3helium.ns.hetzner.de, hydrogen.ns.hetzner.com...
MX1shrek.krogh.cc (pri: 0)
SOA1hydrogen.ns.hetzner.com dns.hetzner.com

Analysis

IP Addresses

open-source.dk resolves to just one IP address, 204.168.134.186.

Name Servers

DNS for open-source.dk is handled by three authoritative name servers: hydrogen.ns.hetzner.com, oxygen.ns.hetzner.com and helium.ns.hetzner.de.

The name servers of open-source.dk overlap at least partially with those of other domains — among them klarmobil-partner.de, dislike.ltd, atomika.io and two more.

The name servers ns1.first-ns.de, ns1.your-server.de, robotns2.second-ns.de and two others are commonly seen in use alongside these name servers.

Three hostnames — hydrogen.ns.hetzner.com, oxygen.ns.hetzner.com and helium.ns.hetzner.de — each have two IP addresses: hydrogen.ns.hetzner.com has 213.133.100.98 and 2a01:4f8:0:1::add:1098, oxygen.ns.hetzner.com has 88.198.229.192 and 2a01:4f8:0:1::add:2992, and helium.ns.hetzner.de has 193.47.99.5 and 2001:67c:192c::add:5.

Mail Servers

The sole mail server for open-source.dk is shrek.krogh.cc.

Other domains such as coo.dk, krogh.cc and sorensen.cc share the same mail server setup as open-source.dk.

shrek.krogh.cc has exactly one IP number: 87.61.100.231.