knowledge-concepts.com - dns.ninja

`knowledge-concepts.com`

DNSSEC	⚠️ Not signed
A	5.157.87.204^{🇳🇱 CLDIN-NL5.157.80.0/21}
		PTR	`redirect.yourhosting.nl`
NS	`ns3.firstfind.nl` ⭐
		A	2a01:b940:1057::53^{🇳🇱 CLDIN-NL2a01:b940::/29 YOURHOSTING}
			PTR	`ns3.firstfind.nl`
		A	5.157.86.222^{🇳🇱 CLDIN-NL5.157.80.0/21}
			PTR	`ns3.firstfind.nl`
NS	`ns4.firstfind.nl`
		A	2a01:b940:1057::54^{🇳🇱 CLDIN-NL2a01:b940::/29 YOURHOSTING}
		A	5.157.87.222^{🇳🇱 CLDIN-NL5.157.80.0/21}
			PTR	`ns4.firstfind.nl`
NS	`ns5.firstfind.net`
		A	2a03:b0c0:2:d0::1183:f001^{🇳🇱 DIGITALOCEAN2a03:b0c0:2::/48 DigitalOcean}
			PTR	`ns5.firstfind.net`
		A	178.128.248.2^{🇳🇱 DIGITALOCEAN178.128.240.0/20 DigitalOcean}
			PTR	`ns5.firstfind.net`
MX	`primary.yourfilter.nl` ⭐
		A	2a01:b941:2::23^{🇳🇱 CLDIN-NL2a01:b940::/29 YOURHOSTING}
			PTR	`se23-yh.route25.eu`
		A	2a01:b941:2::24^{🇳🇱 CLDIN-NL2a01:b940::/29 YOURHOSTING}
			PTR	`se22-yh.route25.eu`
		A	2a01:b941:2::25^{🇳🇱 CLDIN-NL2a01:b940::/29 YOURHOSTING}
			PTR	`se21-yh.route25.eu`
		A	2a01:b941:2::26^{🇳🇱 CLDIN-NL2a01:b940::/29 YOURHOSTING}
			PTR	`se20-yh.route25.eu`
		A	2a01:b941:2::27^{🇳🇱 CLDIN-NL2a01:b940::/29 YOURHOSTING}
			PTR	`se19-yh.route25.eu`
		A	2a01:b941:2::28^{🇳🇱 CLDIN-NL2a01:b940::/29 YOURHOSTING}
			PTR	`se18-yh.route25.eu`
		A	2a01:b941:2::29^{🇳🇱 CLDIN-NL2a01:b940::/29 YOURHOSTING}
			PTR	`se17-yh.route25.eu`
		A	2a01:b941:2::30^{🇳🇱 CLDIN-NL2a01:b940::/29 YOURHOSTING}
			PTR	`se16-yh.route25.eu`
		A	2a05:1500:702:9:1c00:2aff:fe00:5554^{🇳🇱 CLDIN-NL2a05:1500::/29}
		A	2a05:1500:702:9:1c00:7fff:fe00:5556^{🇳🇱 CLDIN-NL2a05:1500::/29}
		A	2a05:1500:702:9:1c00:a3ff:fe00:5558^{🇳🇱 CLDIN-NL2a05:1500::/29}
		A	2a05:1500:702:9:1c00:a5ff:fe00:5553^{🇳🇱 CLDIN-NL2a05:1500::/29}
		A	2a05:1500:702:9:1c00:f0ff:fe00:5555^{🇳🇱 CLDIN-NL2a05:1500::/29}
		A	185.103.241.20^{🇳🇱 CLDIN-NL185.103.240.0/22}
		A	185.103.241.21^{🇳🇱 CLDIN-NL185.103.240.0/22}
		A	185.103.241.22^{🇳🇱 CLDIN-NL185.103.240.0/22}
		A	185.103.241.23^{🇳🇱 CLDIN-NL185.103.240.0/22}
		A	185.103.241.25^{🇳🇱 CLDIN-NL185.103.240.0/22}
		A	185.223.33.23^{🇳🇱 CLDIN-NL185.223.32.0/22}
			PTR	`se23-yh.route25.eu`
		A	185.223.33.24^{🇳🇱 CLDIN-NL185.223.32.0/22}
			PTR	`se22-yh.route25.eu`
		A	185.223.33.27^{🇳🇱 CLDIN-NL185.223.32.0/22}
			PTR	`se19-yh.route25.eu`
		A	185.223.33.28^{🇳🇱 CLDIN-NL185.223.32.0/22}
			PTR	`se18-yh.route25.eu`
		A	185.223.33.29^{🇳🇱 CLDIN-NL185.223.32.0/22}
			PTR	`se17-yh.route25.eu`
		A	185.223.33.30^{🇳🇱 CLDIN-NL185.223.32.0/22}
			PTR	`se16-yh.route25.eu`
MX	`fallback.yourfilter.nl`⁽²⁰⁾
		A	2a01:b941:2::23^{🇳🇱 CLDIN-NL2a01:b940::/29 YOURHOSTING}
			PTR	`se23-yh.route25.eu`
		A	2a01:b941:2::24^{🇳🇱 CLDIN-NL2a01:b940::/29 YOURHOSTING}
			PTR	`se22-yh.route25.eu`
		A	2a01:b941:2::28^{🇳🇱 CLDIN-NL2a01:b940::/29 YOURHOSTING}
			PTR	`se18-yh.route25.eu`
		A	2a01:b941:2::29^{🇳🇱 CLDIN-NL2a01:b940::/29 YOURHOSTING}
			PTR	`se17-yh.route25.eu`
		A	2a01:b941:2::30^{🇳🇱 CLDIN-NL2a01:b940::/29 YOURHOSTING}
			PTR	`se16-yh.route25.eu`
		A	2a05:1500:702:9:1c00:7fff:fe00:5556^{🇳🇱 CLDIN-NL2a05:1500::/29}
		A	2a05:1500:702:9:1c00:f0ff:fe00:5555^{🇳🇱 CLDIN-NL2a05:1500::/29}
		A	185.103.241.22^{🇳🇱 CLDIN-NL185.103.240.0/22}
		A	185.103.241.23^{🇳🇱 CLDIN-NL185.103.240.0/22}
		A	185.223.33.23^{🇳🇱 CLDIN-NL185.223.32.0/22}
			PTR	`se23-yh.route25.eu`
		A	185.223.33.25^{🇳🇱 CLDIN-NL185.223.32.0/22}
			PTR	`se21-yh.route25.eu`
		A	185.223.33.26^{🇳🇱 CLDIN-NL185.223.32.0/22}
			PTR	`se20-yh.route25.eu`
		A	185.223.33.27^{🇳🇱 CLDIN-NL185.223.32.0/22}
			PTR	`se19-yh.route25.eu`
		A	185.223.33.30^{🇳🇱 CLDIN-NL185.223.32.0/22}
			PTR	`se16-yh.route25.eu`
TXT	`v=spf1 a mx include:_spf.yourfilter.nl -all`
TXT	`MS=ms73847774`
TXT	`google-site-verification=HyjR464cn0diUk6ajiTo_F5LDksnT8ctJ-q5V35INtY`
SOA	`ns3.firstfind.nl`hostmaster@firstfind@nl 2019-10-30 #1

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1785140037

WOT: UNKNOWN (60/100)

Same first word

knowledge-concepts.com

DNS History

15 records (6 active, 9 former)

○NSns1.cyberwizards.nl2007-10-24 → 2018-07-12 · 4 obs

● 2007-10-24 11:33:40
● 2018-07-12 16:08:58
○ 2026-04-14 08:17:46
○ 2026-07-27 08:39:40

○NSns2.cyberwizards.nl2007-10-24 → 2018-07-12 · 4 obs

● 2007-10-24 11:33:40
● 2018-07-12 16:08:58
○ 2026-04-14 08:17:46
○ 2026-07-27 08:39:40

○NSns3.cyberwizards.nl2007-10-24 → 2018-07-12 · 4 obs

● 2007-10-24 11:33:40
● 2018-07-12 16:08:58
○ 2026-04-14 08:17:46
○ 2026-07-27 08:39:40

●NSns3.firstfind.nl2026-04-14 → 2026-07-27 · 3 obs

○ 2018-07-12 16:08:58
● 2026-04-14 08:17:46
● 2026-07-27 08:39:40

●NSns4.firstfind.nl2026-04-14 → 2026-07-27 · 3 obs

○ 2018-07-12 16:08:58
● 2026-04-14 08:17:46
● 2026-07-27 08:39:40

●NSns5.firstfind.net2026-04-14 → 2026-07-27 · 3 obs

○ 2018-07-12 16:08:58
● 2026-04-14 08:17:46
● 2026-07-27 08:39:40

○MXfallback.cyberwizards.nl2007-10-24 → 2018-07-12 · 4 obs

● 2007-10-24 11:33:40
● 2018-07-12 16:08:58
○ 2026-04-14 08:17:46
○ 2026-07-27 08:39:40

●MXfallback.yourfilter.nl2026-04-14 → 2026-07-27 · 3 obs

○ 2018-07-12 16:08:58
● 2026-04-14 08:17:46
● 2026-07-27 08:39:40

○MXmail.cyberwizards.nl2007-10-24 → 2007-10-24 · 3 obs

● 2007-10-24 11:33:40
○ 2015-07-13 13:33:38
○ 2026-07-27 08:39:40

○MXmail2.cyberwizards.nl2007-10-24 → 2007-10-24 · 3 obs

● 2007-10-24 11:33:40
○ 2015-07-13 13:33:38
○ 2026-07-27 08:39:40

○MXmx.cyberwizards.nl2015-07-13 → 2018-07-12 · 5 obs

○ 2007-10-24 11:33:40
● 2015-07-13 13:33:38
● 2018-07-12 16:08:58
○ 2026-04-14 08:17:46
○ 2026-07-27 08:39:40

●MXprimary.yourfilter.nl2026-04-14 → 2026-07-27 · 3 obs

○ 2018-07-12 16:08:58
● 2026-04-14 08:17:46
● 2026-07-27 08:39:40

○A188.122.75.1382018-07-12 → 2018-07-12 · 4 obs

○ 2017-01-26 22:39:46
● 2018-07-12 16:08:58
○ 2026-04-14 08:17:46
○ 2026-07-27 08:39:40

○A188.122.75.2012016-02-08 → 2017-01-26 · 4 obs

● 2016-02-08 11:43:54
● 2017-01-26 22:39:46
○ 2018-07-12 16:08:58
○ 2026-07-27 08:39:40

●A5.157.87.2042026-04-14 → 2026-07-27 · 3 obs

○ 2018-07-12 16:08:58
● 2026-04-14 08:17:46
● 2026-07-27 08:39:40

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	c.gtld-servers.net, g.gtld-servers.net, d.gtld-servers.net, b.gtld-servers.net...	-
knowledge-concepts.com	ns4.firstfind.nl, ns3.firstfind.nl, ns5.firstfind.net	-

✅ Authoritative Response

Server:178.128.248.2

NS records: ns4.firstfind.nl, ns3.firstfind.nl, ns5.firstfind.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for knowledge-concepts.com (unsigned zone)

⏱️ Timing

Total: 701ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`5.157.87.204`
NS	3	`ns3.firstfind.nl, ns5.firstfind.net...`
MX	2	`primary.yourfilter.nl (pri: 10), fallback.yourfilter.nl (pri: 20)`
TXT	3	`v=spf1 a mx include:_spf.yourfilter.nl -, MS=ms73847774...`
SOA	1	`ns3.firstfind.nl hostmaster@firstfind.nl`

Analysis

IP Addresses

knowledge-concepts.com points to a single IP number: 5.157.87.204.

Additional host names — stebel.com, ik-asd.de, juko.nl and two others — share IP numbers with knowledge-concepts.com.

Name Servers

knowledge-concepts.com has three name servers — ns5.firstfind.net, ns3.firstfind.nl and ns4.firstfind.nl.

knowledge-concepts.com has at least partial name server overlap with other domains, such as buenavistabeachclub.nl, ooievaars.eu, selfsat.be and two others.

Each of ns5.firstfind.net, ns3.firstfind.nl and ns4.firstfind.nl points to two IP numbers. ns5.firstfind.net points to 178.128.248.2 and 2a03:b0c0:2:d0::1183:f001. ns3.firstfind.nl points to 5.157.86.222 and 2a01:b940:1057::53. ns4.firstfind.nl points to 5.157.87.222 and 2a01:b940:1057::54.

Mail Servers

knowledge-concepts.com has two mail servers: fallback.yourfilter.nl and primary.yourfilter.nl.

knowledge-concepts.com shares the same mail server setup as other domains, including ferienhaus-mit-hunden.de, kevinlenssen.com, verrassendvalencia.nl and two others.

knowledge-concepts.com shares mail servers — at least in part — with other domains, including vdwi.nl, mausweb.nl, bodysolid.nl and two others.

Host names with 24 IP numbers:

primary.yourfilter.nl points to 185.103.241.20, 185.103.241.21, 185.103.241.22 and 21 other IP addresses.

Host names with 14 IP numbers:

fallback.yourfilter.nl points to 185.103.241.22, 185.103.241.23, 185.223.33.23 and 11 other IP addresses.

The host names primary.yourfilter.nl and fallback.yourfilter.nl both resolve to 2a01:b941:2::23 IP addresses.

The host names primary.yourfilter.nl and fallback.yourfilter.nl both resolve to 2a01:b941:2::24 IP addresses.

The host names primary.yourfilter.nl and fallback.yourfilter.nl both resolve to 2a01:b941:2::28 IP addresses.

The host names primary.yourfilter.nl and fallback.yourfilter.nl both resolve to 2a01:b941:2::29 IP addresses.

The host names primary.yourfilter.nl and fallback.yourfilter.nl both resolve to 2a01:b941:2::30 IP addresses.

The host names primary.yourfilter.nl and fallback.yourfilter.nl both resolve to 2a05:1500:702:9:1c00:7fff:fe00:5556 IP addresses.

The host names primary.yourfilter.nl and fallback.yourfilter.nl both resolve to 2a05:1500:702:9:1c00:f0ff:fe00:5555 IP addresses.

The host names primary.yourfilter.nl and fallback.yourfilter.nl both resolve to 185.103.241.22 IP addresses.

The host names primary.yourfilter.nl and fallback.yourfilter.nl both resolve to 185.103.241.23 IP addresses.

The host names primary.yourfilter.nl and fallback.yourfilter.nl both resolve to 185.223.33.23 IP addresses.

The host names primary.yourfilter.nl and fallback.yourfilter.nl both resolve to 185.223.33.27 IP addresses.

The host names primary.yourfilter.nl and fallback.yourfilter.nl both resolve to 185.223.33.30 IP addresses.