`booking-system.dk`

DNSSEC	⚠️ Not signed
A	91.226.144.126^{🇩🇰 noerdnet91.226.144.0/23}
		PTR	`mail.kaltoft.nu`
NS	`hydrogen.ns.hetzner.com` ⭐
		A	2a01:4f8:0:1::add:1098^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
			PTR	`hydrogen.ns.hetzner.com`
		A	213.133.100.98^{🇩🇪 Hetzner213.133.96.0/19 HETZNER-RZ-NBG-BLK1}
			PTR	`hydrogen.ns.hetzner.com`
NS	`helium.ns.hetzner.de`
		A	2001:67c:192c::add:5^{🇩🇪 NORIS-NETWORK2001:67c:192c::/48}
			PTR	`helium.ns.hetzner.de`
		A	193.47.99.5^{🇩🇪 NORIS-NETWORK193.47.99.0/24}
			PTR	`helium.ns.hetzner.de`
NS	`oxygen.ns.hetzner.com`
		A	2a01:4f8:0:1::add:2992^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
			PTR	`oxygen.ns.hetzner.com`
		A	88.198.229.192^{🇩🇪 Hetzner88.198.0.0/16 HETZNER-RZ-NBG-BLK4}
			PTR	`oxygen.ns.hetzner.com`
MX	`mail.booking-system.dk` ⭐
		A	91.226.144.126^{🇩🇰 noerdnet91.226.144.0/23}
			PTR	`mail.kaltoft.nu`
SOA	`hydrogen.ns.hetzner.com`dns@hetzner.com 2026-03-29 #6

`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 1775996821localtime Sun Apr 12 14:27:01 2026gmtime Sun Ap...`
	SOA	`b.nic.dk`tech@punktum.dk serial=1775996821

Same first word

booking-system.cz

booking-system.co.uk

booking-system.dk

booking-system.de

booking-system.eu

booking-system.ch

booking-system.com

booking-system.net

booking-system.info

DNS History

12 records (5 active, 7 former)

●NShelium.ns.hetzner.de2026-03-31 → 2026-04-12 · 3 obs

○ 2020-02-20 14:02:10
● 2026-03-31 23:42:54
● 2026-04-12 12:37:14

●NShydrogen.ns.hetzner.com2026-03-31 → 2026-04-12 · 3 obs

○ 2020-02-20 14:02:10
● 2026-03-31 23:42:54
● 2026-04-12 12:37:14

○NSns1.gratisdns.dk2015-08-07 → 2020-02-20 · 4 obs

● 2015-08-07 05:56:02
● 2020-02-20 14:02:10
○ 2026-03-31 23:42:54
○ 2026-04-12 12:37:14

○NSns2.gratisdns.dk2015-08-07 → 2020-02-20 · 4 obs

● 2015-08-07 05:56:02
● 2020-02-20 14:02:10
○ 2026-03-31 23:42:54
○ 2026-04-12 12:37:14

○NSns3.gratisdns.dk2015-08-07 → 2020-02-20 · 4 obs

● 2015-08-07 05:56:02
● 2020-02-20 14:02:10
○ 2026-03-31 23:42:54
○ 2026-04-12 12:37:14

○NSns4.gratisdns.dk2015-08-07 → 2020-02-20 · 4 obs

● 2015-08-07 05:56:02
● 2020-02-20 14:02:10
○ 2026-03-31 23:42:54
○ 2026-04-12 12:37:14

○NSns5.gratisdns.dk2015-08-07 → 2020-02-20 · 4 obs

● 2015-08-07 05:56:02
● 2020-02-20 14:02:10
○ 2026-03-31 23:42:54
○ 2026-04-12 12:37:14

●NSoxygen.ns.hetzner.com2026-03-31 → 2026-04-12 · 3 obs

○ 2020-02-20 14:02:10
● 2026-03-31 23:42:54
● 2026-04-12 12:37:14

●MXmail.booking-system.dk2026-03-31 → 2026-04-12 · 2 obs

● 2026-03-31 23:42:54
● 2026-04-12 12:37:14

○A193.104.43.1732015-08-07 → 2020-02-20 · 4 obs

● 2015-08-07 05:56:02
● 2020-02-20 14:02:10
○ 2026-03-31 23:42:54
○ 2026-04-12 12:37:14

○A193.104.43.1772026-03-31 → 2026-04-12 · 2 obs

○ 2026-03-31 23:42:54
○ 2026-04-12 12:37:14

●A91.226.144.1262026-03-31 → 2026-04-12 · 3 obs

○ 2020-02-20 14:02:10
● 2026-03-31 23:42:54
● 2026-04-12 12:37:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dk	b.nic.dk, h.nic.dk, s.nic.dk, l.nic.dk...	-
booking-system.dk	helium.ns.hetzner.de, oxygen.ns.hetzner.com, hydrogen.ns.hetzner.com	-

✅ Authoritative Response

Server:193.47.99.5

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for booking-system.dk (unsigned zone)

⏱️ Timing

Total: 1032ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`91.226.144.126`
NS	3	`hydrogen.ns.hetzner.com, oxygen.ns.hetzner.com...`
MX	1	`mail.booking-system.dk (pri: 10)`
SOA	1	`hydrogen.ns.hetzner.com dns.hetzner.com`

Analysis

IP Addresses

booking-system.dk points to IP number: 91.226.144.126.

Other host names, for instance mail.kaltoft.nu and kaltoft.nu, share IP numbers with booking-system.dk.

Name Servers

booking-system.dk is delegated to three name servers: hydrogen.ns.hetzner.com, oxygen.ns.hetzner.com and helium.ns.hetzner.de.

booking-system.dk at least partially shares name servers with other domains, for instance martin-bellinghoff.de, is-kobe.de, wunschlogo24.de, trans-tema.ru and rlhost.de.

these name servers are commonly used with ns1.first-ns.de, ns1.your-server.de, robotns3.second-ns.com and robotns2.second-ns.de.

Host hydrogen.ns.hetzner.com points to 2a01:4f8:0:1::add:1098 and 213.133.100.98; Host oxygen.ns.hetzner.com points to 2a01:4f8:0:1::add:2992 and 88.198.229.192; Host helium.ns.hetzner.de points to 2001:67c:192c::add:5 and 193.47.99.5.

Mail Servers

booking-system.dk is handled by a single mail server, mail.booking-system.dk.

mail.booking-system.dk points to a single IP: 91.226.144.126.

booking-system.dk - robtex.com