`pruefrex.com`

DNSSEC	⚠️ Not signed
A	213.133.104.21^{🇩🇪 Hetzner213.133.96.0/19 HETZNER-RZ-NBG-BLK1}
		PTR	`www21.your-server.de`
NS	`ns1.your-server.de` ⭐
		A	2a01:4f8:0:1::5ddc:1^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
			PTR	`ns1.your-server.de`
		A	213.133.100.102^{🇩🇪 Hetzner213.133.96.0/19 HETZNER-RZ-NBG-BLK1}
			PTR	`ns1.your-server.de`
NS	`ns.second-ns.com`
		A	2a01:4f8:0:a101::b:1^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
			PTR	`ns.second-ns.com`
		A	213.239.204.242^{🇩🇪 Hetzner213.239.192.0/18 HETZNER-RZ-NBG-BLK2}
			PTR	`ns.second-ns.com`
NS	`ns3.second-ns.de`
		A	2001:67c:192c::add:b3^{🇩🇪 NORIS-NETWORK2001:67c:192c::/48}
			PTR	`ns3.second-ns.de`
		A	193.47.99.4^{🇩🇪 NORIS-NETWORK193.47.99.0/24}
			PTR	`ns3.second-ns.de`
MX	`pruefrex-com.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::9^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db7pr03cu00601.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::b^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-dbbpr03cu00103.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::e^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am7pr05cu00206.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::f^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am7pr05cu00307.inbound.protection.outlook.com`
		A	52.101.68.0^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db3pr0202cu00100.inbound.protection.outlook.com`
		A	52.101.73.8^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am0pr04cu00500.inbound.protection.outlook.com`
		A	52.101.73.19^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as8pr04cu00803.inbound.protection.outlook.com`
		A	52.101.73.26^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as9pr05cu01302.inbound.protection.outlook.com`
TXT	`v=spf1 include:spf.protection.outlook.com ip4:93.240.5.149 ip4:87.191.130.240...`
TXT	`MS=ms14666265`
TXT	`google-site-verification=EY4FqIEl2_f-e4D_vRm9Dxc03-qloi6j5_AXAVTPf2g`
SOA	`ns1.your-server.de`postmaster@your-server.de 2026-03-17 #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=1784685107

Subdomains

mail.pruefrex.com

Same first word

pruefrex.com

pruefrex.de

DNS History

7 records (5 active, 2 former)

●NSns.second-ns.com2015-08-11 → 2026-07-22 · 3 obs

○ 2008-03-17 03:58:18
● 2015-08-11 19:57:24
● 2026-07-22 02:00:34

●NSns1.your-server.de2015-08-11 → 2026-07-22 · 3 obs

○ 2008-03-17 03:58:18
● 2015-08-11 19:57:24
● 2026-07-22 02:00:34

●NSns3.second-ns.de2026-04-03 → 2026-07-22 · 3 obs

○ 2015-08-11 19:57:24
● 2026-04-03 02:55:14
● 2026-07-22 02:00:34

○MXmx1.pruefrex.de2015-08-11 → 2017-04-20 · 5 obs

○ 2008-03-17 03:58:18
● 2015-08-11 19:57:24
● 2017-04-20 23:34:28
○ 2026-04-03 02:55:14
○ 2026-07-22 02:00:34

○MXmx2.pruefrex.de2015-08-11 → 2017-04-20 · 5 obs

○ 2008-03-17 03:58:18
● 2015-08-11 19:57:24
● 2017-04-20 23:34:28
○ 2026-04-03 02:55:14
○ 2026-07-22 02:00:34

●MXpruefrex-com.mail.protection.outlook.com2026-04-03 → 2026-07-22 · 3 obs

○ 2017-04-20 23:34:28
● 2026-04-03 02:55:14
● 2026-07-22 02:00:34

●A213.133.104.212008-03-17 → 2026-07-22 · 2 obs

● 2008-03-17 03:58:18
● 2026-07-22 02:00:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
pruefrex.com	ns1.your-server.de, ns.second-ns.com, ns3.second-ns.de	2 records

✅ Authoritative Response

Server:213.133.100.102

NS records: ns1.your-server.de, ns.second-ns.com, ns3.second-ns.de

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for pruefrex.com (unsigned zone)

⏱️ Timing

Total: 994ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`213.133.104.21`
NS	3	`ns3.second-ns.de, ns.second-ns.com...`
MX	1	`pruefrex-com.mail.protection.outlook.com`
TXT	3	`v=spf1 include:spf.protection.outlook.co, MS=ms14666265...`
SOA	1	`ns1.your-server.de postmaster.your-serve`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns.second-ns.com, ns.second-ns.com)

Analysis

Hierarchy

pruefrex.com is the parent zone for mail.pruefrex.com.

IP Addresses

pruefrex.com points to a single IP number: 213.133.104.21.

Additional host names — parksite.eu, mail.pruefrex.com, parkside.at and two others — share IP numbers with pruefrex.com.

Name Servers

pruefrex.com is served by three name servers: ns.second-ns.com, ns3.second-ns.de and ns1.your-server.de.

pruefrex.com partially shares its NS delegation with several other domains, including e.8.6.1.1.7.1.0.8.f.4.0.1.0.a.2.ip6.arpa, trustedtec.de, 111.167.89.in-addr.arpa and two others.

The hostnames ns.second-ns.com, ns3.second-ns.de and ns1.your-server.de each direct to two IP addresses — ns.second-ns.com to 213.239.204.242 and 2a01:4f8:0:a101::b:1, ns3.second-ns.de to 193.47.99.4 and 2001:67c:192c::add:b3, and ns1.your-server.de to 213.133.100.102 and 2a01:4f8:0:1::5ddc:1.

Mail Servers

pruefrex.com has one mail server: pruefrex-com.mail.protection.outlook.com.

pruefrex-com.mail.protection.outlook.com points to 8 IP numbers: 52.101.68.0, 52.101.73.8, 52.101.73.19 and 5 other.

pruefrex.com - robtex.com

pruefrex.com

com