knowledge-network.de - dns.ninja

`knowledge-network.de`

DNSSEC	⚠️ Not signed
A	194.221.28.162^{🇬🇧 CW194.221.0.0/16 EU-EN-194-221-0-16}
NS	`ns1.plusserver.com` ⭐
		A	2a02:cbf3:0:1::96^{🇩🇪 PLUSSERVER-ASN12a02:cbf3::/32 PlusServer GmbH}
			PTR	`ns1.plusserver.com`
		A	62.138.233.183^{🇩🇪 PLUSSERVER-ASN162.138.233.0/24 PS-Net}
			PTR	`auth1.ns.cgn.ps-intern.de`
NS	`ns2.plusserver.com`
		A	2a02:cbf2:0:101::8^{🇩🇪 PLUSSERVER-ASN12a02:cbf2::/32 PlusServer GmbH}
			PTR	`ns2.plusserver.com`
		A	62.138.201.123^{🇩🇪 PLUSSERVER-ASN162.138.192.0/20 PS-Net}
			PTR	`auth2.ns.sxb.ps-intern.de`
NS	`ns3.plusserver.com`
		A	2a05:d014:861:e500:60d1:94f9:5c91:829e^{🇩🇪 Amazon2a05:d014:800::/38 AMAZON AWS}
		A	18.158.102.90^{🇩🇪 Amazon18.156.0.0/14 EC2 FRA prefix}
			PTR	`ec2-18-158-102-90.eu-central-1.compute.amazonaws.com`
MX	`mx-a.psmanaged.com` ⭐
		A	46.22.45.237^{🇩🇪 PLUSSERVER-ASN146.22.40.0/21 PlusServer GmbH}
			PTR	`mx3.psmanaged.com`
MX	`mx-b.psmanaged.com` ⭐
		A	46.22.45.238^{🇩🇪 PLUSSERVER-ASN146.22.40.0/21 PlusServer GmbH}
			PTR	`mx4.psmanaged.com`
MX	`mx-c.psmanaged.com`⁽²⁰⁾
		A	46.22.45.239^{🇩🇪 PLUSSERVER-ASN146.22.40.0/21 PlusServer GmbH}
			PTR	`mx5.psmanaged.com`
MX	`mx-d.psmanaged.com`⁽³⁰⁾
		A	46.22.46.12^{🇩🇪 PLUSSERVER-ASN146.22.40.0/21 PlusServer GmbH}
TXT	`v=spf1 include:relay.mcs.de include:smarthost.mcs.de include:_spf.mailrelay.p...`
SOA	`ns1.plusserver.com`hostmaster@plusserver.com 2021-04-21 #1

`de`

	DNSSEC	🔒 Signed (DS record present)
	NS	`f.nic.de` ⭐
	NS	`a.nic.de`
	NS	`l.de.net` ⚠️ Not in parent delegation
	NS	`n.de.net` ⚠️ Not in parent delegation
	NS	`s.de.net` ⚠️ Not in parent delegation
	NS	`z.nic.de`
	SOA	`f.nic.de`dns-operations@denic.de serial=1785359492

Same first word

knowledge-network.jp

knowledge-network.de

DNS History

14 records (8 active, 6 former)

○NSdns-auth-1.mcs.de2015-07-01 → 2017-01-16 · 4 obs

● 2015-07-01 21:30:00
● 2017-01-16 23:02:42
○ 2026-02-18 11:03:56
○ 2026-07-29 21:29:34

○NSdns-auth-2.mcs.de2015-07-01 → 2017-01-16 · 4 obs

● 2015-07-01 21:30:00
● 2017-01-16 23:02:42
○ 2026-02-18 11:03:56
○ 2026-07-29 21:29:34

○NSdns-auth-3.mcs.de2015-07-01 → 2017-01-16 · 4 obs

● 2015-07-01 21:30:00
● 2017-01-16 23:02:42
○ 2026-02-18 11:03:56
○ 2026-07-29 21:29:34

○NSdns-auth-4.mcs.de2015-07-01 → 2017-01-16 · 4 obs

● 2015-07-01 21:30:00
● 2017-01-16 23:02:42
○ 2026-02-18 11:03:56
○ 2026-07-29 21:29:34

●NSns1.plusserver.com2026-02-18 → 2026-07-29 · 3 obs

○ 2017-01-16 23:02:42
● 2026-02-18 11:03:56
● 2026-07-29 21:29:34

●NSns2.plusserver.com2026-02-18 → 2026-07-29 · 3 obs

○ 2017-01-16 23:02:42
● 2026-02-18 11:03:56
● 2026-07-29 21:29:34

●NSns3.plusserver.com2026-02-18 → 2026-07-29 · 3 obs

○ 2017-01-16 23:02:42
● 2026-02-18 11:03:56
● 2026-07-29 21:29:34

○MXbackup-mx.mcs.de2015-07-01 → 2017-01-16 · 4 obs

● 2015-07-01 21:30:00
● 2017-01-16 23:02:42
○ 2026-02-18 11:03:56
○ 2026-07-29 21:29:34

●MXmx-a.psmanaged.com2026-02-18 → 2026-07-29 · 3 obs

○ 2017-01-16 23:02:42
● 2026-02-18 11:03:56
● 2026-07-29 21:29:34

●MXmx-b.psmanaged.com2026-02-18 → 2026-07-29 · 3 obs

○ 2017-01-16 23:02:42
● 2026-02-18 11:03:56
● 2026-07-29 21:29:34

●MXmx-c.psmanaged.com2026-02-18 → 2026-07-29 · 3 obs

○ 2017-01-16 23:02:42
● 2026-02-18 11:03:56
● 2026-07-29 21:29:34

●MXmx-d.psmanaged.com2026-02-18 → 2026-07-29 · 3 obs

○ 2017-01-16 23:02:42
● 2026-02-18 11:03:56
● 2026-07-29 21:29:34

○MXsmtp.mcs.de2015-07-01 → 2017-01-16 · 4 obs

● 2015-07-01 21:30:00
● 2017-01-16 23:02:42
○ 2026-02-18 11:03:56
○ 2026-07-29 21:29:34

●A194.221.28.1622015-07-01 → 2026-07-29 · 2 obs

● 2015-07-01 21:30:00
● 2026-07-29 21:29:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	a.nic.de, f.nic.de, z.nic.de	-
knowledge-network.de	ns1.plusserver.com, ns3.plusserver.com, ns2.plusserver.com	-

✅ Authoritative Response

Server:62.138.201.123

NS records: ns1.plusserver.com, ns3.plusserver.com, ns2.plusserver.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for knowledge-network.de (unsigned zone)

⏱️ Timing

Total: 2894ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`194.221.28.162`
NS	3	`ns1.plusserver.com, ns3.plusserver.com...`
MX	4	`mx-b.psmanaged.com (pri: 10), mx-a.psmanaged.com (pri: 10)...`
TXT	1	`v=spf1 include:relay.mcs.de include:smar`
SOA	1	`ns1.plusserver.com hostmaster.plusserver`

Analysis

IP Addresses

knowledge-network.de points to a single IP number: 194.221.28.162.

knw.de is an example of another host name that shares IP numbers with knowledge-network.de.

Name Servers

knowledge-network.de has three name servers — ns1.plusserver.com, ns2.plusserver.com and ns3.plusserver.com.

knowledge-network.de partially shares its NS delegation with several other domains, including westbhopen.de, sana-klinik-einkauf.de, minimum-maximum.de and two others.

Each of ns1.plusserver.com, ns2.plusserver.com and ns3.plusserver.com points to two IP numbers. ns1.plusserver.com points to 62.138.233.183 and 2a02:cbf3:0:1::96. ns2.plusserver.com points to 62.138.201.123 and 2a02:cbf2:0:101::8. ns3.plusserver.com points to 18.158.102.90 and 2a05:d014:861:e500:60d1:94f9:5c91:829e.

Mail Servers

knowledge-network.de has four mail servers: mx-a.psmanaged.com, mx-b.psmanaged.com, mx-c.psmanaged.com and mx-d.psmanaged.com.

knowledge-network.de shares mail servers — at least in part — with other domains, including struty.de, konfuzius-institut-heidelberg.de, skiresort.tv and two others.

mx-a.psmanaged.com, mx-b.psmanaged.com, mx-c.psmanaged.com and mx-d.psmanaged.com each resolve to one IP address: mx-a.psmanaged.com resolves to 46.22.45.237, mx-b.psmanaged.com resolves to 46.22.45.238, mx-c.psmanaged.com resolves to 46.22.45.239 and mx-d.psmanaged.com resolves to 46.22.46.12.