`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}
			PTR	`se28-yh.route25.eu`
		A	2a05:1500:702:9:1c00:7fff:fe00:5556^{🇳🇱 CLDIN-NL2a05:1500::/29}
			PTR	`se30-yh.route25.eu`
		A	2a05:1500:702:9:1c00:a3ff:fe00:5558^{🇳🇱 CLDIN-NL2a05:1500::/29}
			PTR	`se26-yh.route25.eu`
		A	2a05:1500:702:9:1c00:a5ff:fe00:5553^{🇳🇱 CLDIN-NL2a05:1500::/29}
			PTR	`se27-yh.route25.eu`
		A	2a05:1500:702:9:1c00:f0ff:fe00:5555^{🇳🇱 CLDIN-NL2a05:1500::/29}
			PTR	`se29-yh.route25.eu`
		A	185.103.241.20^{🇳🇱 CLDIN-NL185.103.240.0/22}
			PTR	`se27-yh.route25.eu`
		A	185.103.241.21^{🇳🇱 CLDIN-NL185.103.240.0/22}
			PTR	`se28-yh.route25.eu`
		A	185.103.241.22^{🇳🇱 CLDIN-NL185.103.240.0/22}
			PTR	`se29-yh.route25.eu`
		A	185.103.241.23^{🇳🇱 CLDIN-NL185.103.240.0/22}
			PTR	`se30-yh.route25.eu`
		A	185.103.241.25^{🇳🇱 CLDIN-NL185.103.240.0/22}
			PTR	`se26-yh.route25.eu`
		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}
			PTR	`se30-yh.route25.eu`
		A	2a05:1500:702:9:1c00:f0ff:fe00:5555^{🇳🇱 CLDIN-NL2a05:1500::/29}
			PTR	`se29-yh.route25.eu`
		A	185.103.241.22^{🇳🇱 CLDIN-NL185.103.240.0/22}
			PTR	`se29-yh.route25.eu`
		A	185.103.241.23^{🇳🇱 CLDIN-NL185.103.240.0/22}
			PTR	`se30-yh.route25.eu`
		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	`MS=ms73847774`
TXT	`google-site-verification=HyjR464cn0diUk6ajiTo_F5LDksnT8ctJ-q5V35INtY`
TXT	`v=spf1 a mx include:_spf.yourfilter.nl -all`
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=1776205752

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
○ 2026-04-14 22:31:04

○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
○ 2026-04-14 22:31:04

○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
○ 2026-04-14 22:31:04

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

○ 2018-07-12 16:08:58
● 2026-04-14 08:17:46
● 2026-04-14 22:31:04

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

○ 2018-07-12 16:08:58
● 2026-04-14 08:17:46
● 2026-04-14 22:31:04

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

○ 2018-07-12 16:08:58
● 2026-04-14 08:17:46
● 2026-04-14 22:31:04

○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
○ 2026-04-14 22:31:04

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

○ 2018-07-12 16:08:58
● 2026-04-14 08:17:46
● 2026-04-14 22:31:04

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

● 2007-10-24 11:33:40
○ 2015-07-13 13:33:38
○ 2026-04-14 22:31:04

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

● 2007-10-24 11:33:40
○ 2015-07-13 13:33:38
○ 2026-04-14 22:31:04

○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
○ 2026-04-14 22:31:04

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

○ 2018-07-12 16:08:58
● 2026-04-14 08:17:46
● 2026-04-14 22:31:04

○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
○ 2026-04-14 22:31:04

○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
○ 2026-04-14 22:31:04

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

○ 2018-07-12 16:08:58
● 2026-04-14 08:17:46
● 2026-04-14 22:31:04

🔍 DNS Trace

📋 Delegation Chain

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

✅ Authoritative Response

Server:5.157.87.222

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: 720ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`5.157.87.204`
NS	3	`ns3.firstfind.nl, ns4.firstfind.nl...`
MX	2	`fallback.yourfilter.nl (pri: 20), primary.yourfilter.nl (pri: 10)`
TXT	3	`MS=ms73847774, v=spf1 a mx include:_spf.yourfilter.nl -...`
SOA	1	`ns3.firstfind.nl hostmaster@firstfind.nl`

Analysis

IP Addresses

knowledge-concepts.com resolves to a single IP: 5.157.87.204.

Other host names, for instance fcdd.nl, lukasart.com, erikpoels.nl, thetravelgiftcard.com and marcelmeijer.net share IP numbers with knowledge-concepts.com.

Name Servers

knowledge-concepts.com delegates to three name servers: ns5.firstfind.net, ns3.firstfind.nl and ns4.firstfind.nl.

knowledge-concepts.com shares some name servers with other domains, for example buenavistabeachclub.nl, ooievaars.eu, selfsat.be, samenleeftest.nl and cciu.nl.

Host names with two IP numbers:

ns5.firstfind.net: 2a03:b0c0:2:d0::1183:f001 and 178.128.248.2

ns3.firstfind.nl: 2a01:b940:1057::53 and 5.157.86.222

ns4.firstfind.nl: 2a01:b940:1057::54 and 5.157.87.222

Mail Servers

knowledge-concepts.com is served by two mail servers: fallback.yourfilter.nl and primary.yourfilter.nl.

knowledge-concepts.com shares the mail server setup with other domains, for example ferienhaus-mit-hunden.de, kevinlenssen.com, verrassendvalencia.nl, melding.nu and aircoin.nl.

knowledge-concepts.com shares some mail servers with other domains, at least partially; for instance vdwi.nl, mausweb.nl, bodysolid.nl, sekologistics.nl and proda.nl.