mail.cortex-development.com - dns.ninja

`mail.cortex-development.com`

DNSSEC	⚠️ Not signed
A	213.239.215.241^{🇩🇪 Hetzner213.239.192.0/18 HETZNER-RZ-NBG-BLK2}
		PTR	`cortex2.nebelhauch.de`

`cortex-development.com`

	DNSSEC	⚠️ Not signed
	A	213.239.215.241^{🇩🇪 Hetzner213.239.192.0/18 HETZNER-RZ-NBG-BLK2}
	NS	`ns1.first-ns.de` ⭐
	NS	`robotns2.second-ns.de`
	NS	`robotns3.second-ns.com`
	MX	`mail.cortex-development.com` ⭐
	TXT	`v=spf1 mx mx:cortex2.nebelhauch.de -all`
	SOA	`ns1.first-ns.de`dns@hetzner.com 2026-04-14 #0

MX for

cortex-development.com

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DNS History

1 record (1 active, 0 former)

●A213.239.215.2412015-07-08 → 2026-06-27 · 2 obs

● 2015-07-08 19:36:02
● 2026-06-27 10:34:22

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
cortex-development.com	ns1.first-ns.de, robotns2.second-ns.de, robotns3.second-ns.com	2 records

✅ Authoritative Response

Server:213.239.242.238

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cortex-development.com (unsigned zone)

⏱️ Timing

Total: 846ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`213.239.215.241`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (robotns3.second-ns.com, robotns3.second-ns.com)

Analysis

Mail Server Role

Mail for cortex-development.com is routed through the mail server mail.cortex-development.com.

IP Addresses

mail.cortex-development.com has exactly one IP address — 213.239.215.241.

cortex2.nebelhauch.de, familiehartig.de, 213-239-215-241.clients.your-server.de plus two other host names have IP numbers in common with mail.cortex-development.com.