`mail.rackbuilder.de`

DNSSEC	⚠️ Not signed
A	212.223.165.71^{🇩🇪 ratiokontakt212.223.0.0/16 GmbH}
		PTR	`frontend.clustermail.de`

`rackbuilder.de`

	DNSSEC	⚠️ Not signed
	A	2a02:708:0:ab::2^{🇩🇪 ratiokontakt2a02:708::/32 GmbH}
	A	212.223.17.18^{🇩🇪 ratiokontakt212.223.0.0/16 GmbH}
	NS	`ns.nameserver7.de` ⭐
	NS	`ns.nameserver8.de`
	MX	`mail.rackbuilder.de` ⭐
	MX	`mail2.rackbuilder.de`⁽²⁰⁾
	SOA	`ns.nameserver7.de`dnsmaster@ns.nameserver7.de 2018-02-12 #2

MX for

rackbuilder.de

Same first word

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DNS History

1 record (1 active, 0 former)

●A212.223.165.712015-07-15 → 2026-05-13 · 2 obs

● 2015-07-15 09:52:18
● 2026-05-13 23:33:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	a.nic.de, f.nic.de, z.nic.de	-
rackbuilder.de	ns.nameserver7.de, ns.nameserver8.de	-

✅ Authoritative Response

Server:212.223.44.220

NS records: ns.nameserver7.de, ns.nameserver8.de

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rackbuilder.de (unsigned zone)

⏱️ Timing

Total: 3304ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`212.223.165.71`

Analysis

Mail Server Role

mail.rackbuilder.de serves as the mail server for rackbuilder.de.

mail2.rackbuilder.de commonly serves as a mail server along with mail.rackbuilder.de.

IP Addresses

mail.rackbuilder.de points to an IP address: 212.223.165.71.

other host names include mail.shalom-ssnd.de, mail.hopfenmuseum-tettnang.de, mail.treckerbude.de, mail.farbe-glas.de and mail.autohaus-wolf-leo.de; they share IP numbers with mail.rackbuilder.de.

mail.rackbuilder.de - robtex.com