`mail.pruefrex.com`

DNSSEC	⚠️ Not signed
A	213.133.104.21^{🇩🇪 Hetzner213.133.96.0/19 HETZNER-RZ-NBG-BLK1}
		PTR	`www21.your-server.de`

`pruefrex.com`

	DNSSEC	⚠️ Not signed
	A	213.133.104.21^{🇩🇪 Hetzner213.133.96.0/19 HETZNER-RZ-NBG-BLK1}
	NS	`ns1.your-server.de` ⭐
	NS	`ns.second-ns.com`
	NS	`ns3.second-ns.de`
	MX	`pruefrex-com.mail.protection.outlook.com` ⭐
	TXT	`MS=ms14666265`
	TXT	`google-site-verification=EY4FqIEl2_f-e4D_vRm9Dxc03-qloi6j5_AXAVTPf2g`
	TXT	`v=spf1 include:spf.protection.outlook.com ip4:93.240.5.149 ip4:87.191.130.240...`
	SOA	`ns1.your-server.de`postmaster@your-server.de 2026-03-17 #0

Same first word

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DNS History

1 record (1 active, 0 former)

●A213.133.104.212015-06-07 → 2026-07-27 · 2 obs

● 2015-06-07 00:11:12
● 2026-07-27 10:06:48

🔍 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: 242ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`213.133.104.21`

📌 Glue Records Collected

Total: 2

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

Analysis

IP Addresses

mail.pruefrex.com has exactly one IP address — 213.133.104.21.

mueller-walldorf.de, mail.dhf.de, opentext-usergroup.com plus two other host names have IP numbers in common with mail.pruefrex.com.

mail.pruefrex.com - robtex.com