`mail.cortex-research.de`

DNSSEC	⚠️ Not signed
A	136.243.217.222^{🇩🇪 Hetzner136.243.0.0/16 HETZNER-RZ-BLK-ERX3}
		PTR	`mail.cortex-media.de`

`cortex-research.de`

	DNSSEC	⚠️ Not signed
	NS	`ns1.first-ns.de` ⭐
	NS	`robotns2.second-ns.de`
	NS	`robotns3.second-ns.com`
	MX	`mail.cortex-research.de` ⭐
	TXT	`v=spf1 mx -all`
	SOA	`ns1.first-ns.de`dns@hetzner.com 2026-02-10 #0

MX for

cortex-research.de

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DNS History

1 record (1 active, 0 former)

●A136.243.217.2222018-05-17 → 2026-04-14 · 2 obs

● 2018-05-17 20:01:58
● 2026-04-14 09:29:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	a.nic.de, z.nic.de, f.nic.de	-
cortex-research.de	robotns3.second-ns.com, ns1.first-ns.de, robotns2.second-ns.de	-

✅ Authoritative Response

Server:193.47.99.3

NS records: robotns3.second-ns.com, ns1.first-ns.de, robotns2.second-ns.de

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cortex-research.de (unsigned zone)

⏱️ Timing

Total: 1147ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`136.243.217.222`

Analysis

Mail Server Role

mail.cortex-research.de functions as a mail server for cortex-research.de.

IP Addresses

mail.cortex-research.de points to IP number: 136.243.217.222.

Other host names such as mail.cortexairlines.de, mail.cortex-media.com, mail.cortex-airlines.com, mail.cortex-media.de and mail.kortex-media.com share IPs with mail.cortex-research.de.

mail.cortex-research.de - robtex.com