`21centuryhost.com`

DNSSEC	⚠️ Not signed
A	78.46.181.4^{🇩🇪 Hetzner78.46.0.0/15 HETZNER-RZ-NBG-BLK5}
		PTR	`www198.your-server.de`
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.21centuryhost.com` ⭐
		A	78.46.181.4^{🇩🇪 Hetzner78.46.0.0/15 HETZNER-RZ-NBG-BLK5}
			PTR	`www198.your-server.de`
TXT	`v=spf1 a mx ~all`
SOA	`hydrogen.ns.hetzner.com`dns@hetzner.com 2026-02-11 #0

`com`

	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=1776686207

Subdomains

mail.21centuryhost.com

Same first word

21centuryhost.com

DNS History

12 records (5 active, 7 former)

●NShelium.ns.hetzner.de2026-02-19 → 2026-04-20 · 3 obs

○ 2017-06-30 21:20:02
● 2026-02-19 03:48:02
● 2026-04-20 12:08:10

●NShydrogen.ns.hetzner.com2026-02-19 → 2026-04-20 · 3 obs

○ 2017-06-30 21:20:02
● 2026-02-19 03:48:02
● 2026-04-20 12:08:10

○NSns1.hastydns.com2017-06-30 → 2017-06-30 · 4 obs

○ 2015-10-30 21:30:06
● 2017-06-30 21:20:02
○ 2026-02-19 03:48:02
○ 2026-04-20 12:08:10

○NSns1.parked.com2008-03-19 → 2008-03-19 · 3 obs

● 2008-03-19 05:12:50
○ 2015-10-30 21:30:06
○ 2026-04-20 12:08:10

○NSns2.hastydns.com2017-06-30 → 2017-06-30 · 4 obs

○ 2015-10-30 21:30:06
● 2017-06-30 21:20:02
○ 2026-02-19 03:48:02
○ 2026-04-20 12:08:10

○NSns2.parked.com2008-03-19 → 2008-03-19 · 3 obs

● 2008-03-19 05:12:50
○ 2015-10-30 21:30:06
○ 2026-04-20 12:08:10

●NSoxygen.ns.hetzner.com2026-02-19 → 2026-04-20 · 3 obs

○ 2017-06-30 21:20:02
● 2026-02-19 03:48:02
● 2026-04-20 12:08:10

●MXmail.21centuryhost.com2026-02-19 → 2026-04-20 · 2 obs

● 2026-02-19 03:48:02
● 2026-04-20 12:08:10

○A69.162.80.512017-06-30 → 2017-06-30 · 4 obs

○ 2015-10-30 21:30:06
● 2017-06-30 21:20:02
○ 2026-02-19 03:48:02
○ 2026-04-20 12:08:10

○A69.46.226.1692008-03-19 → 2008-03-19 · 3 obs

● 2008-03-19 05:12:50
○ 2015-10-30 21:30:06
○ 2026-04-20 12:08:10

●A78.46.181.42026-02-19 → 2026-04-20 · 3 obs

○ 2017-06-30 21:20:02
● 2026-02-19 03:48:02
● 2026-04-20 12:08:10

○A95.211.219.652017-06-30 → 2017-06-30 · 4 obs

○ 2015-10-30 21:30:06
● 2017-06-30 21:20:02
○ 2026-02-19 03:48:02
○ 2026-04-20 12:08:10

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
21centuryhost.com	helium.ns.hetzner.de, hydrogen.ns.hetzner.com, oxygen.ns.hetzner.com	2 records

✅ Authoritative Response

Server:88.198.229.192

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 21centuryhost.com (unsigned zone)

⏱️ Timing

Total: 1064ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`78.46.181.4`
NS	3	`hydrogen.ns.hetzner.com, oxygen.ns.hetzner.com...`
MX	1	`mail.21centuryhost.com (pri: 10)`
TXT	1	`v=spf1 a mx ~all`
SOA	1	`hydrogen.ns.hetzner.com dns.hetzner.com`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (hydrogen.ns.hetzner.com, oxygen.ns.hetzner.com)

Analysis

Hierarchy

21centuryhost.com is a parent of mail.21centuryhost.com.

IP Addresses

21centuryhost.com points to a single IP number: 78.46.181.4.

Other host names, for instance loeser-it.com, niendorfer-nachbarn.de, seefrucht.com, yoo.boutique and manage4you.de share IP numbers with 21centuryhost.com.

Name Servers

The delegation for 21centuryhost.com is handled by three name servers: hydrogen.ns.hetzner.com, oxygen.ns.hetzner.com and helium.ns.hetzner.de.

21centuryhost.com at least partially shares name servers with other domains, for instance torkildr.no, pia-ds.com, sg.at, kinderbauernhoefe.at and timebalance.de.

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

Two IP numbers per host:

hydrogen.ns.hetzner.com points to 2a01:4f8:0:1::add:1098 and 213.133.100.98.

oxygen.ns.hetzner.com points to 2a01:4f8:0:1::add:2992 and 88.198.229.192.

helium.ns.hetzner.de points to 2001:67c:192c::add:5 and 193.47.99.5.

Mail Servers

21centuryhost.com is handled by a single mail server, mail.21centuryhost.com.

mail.21centuryhost.com points to a single IP: 78.46.181.4.

21centuryhost.com - robtex.com