`koorscholing.com`

DNSSEC	⚠️ Not signed
A	185.37.71.71^{🇳🇱 CLDIN-NL185.37.68.0/22}
		PTR	`server104.yourhosting.nl`
NS	`ns-d.dns.yourhosting.nl` ⭐
		A	2a05:1500:600:5:1c00:e3ff:fe00:d52^{🇳🇱 CLDIN-NL2a05:1500:600::/40 PCextreme B.V. - Amsterdam (ams02)}
			PTR	`dns-yh-10.dns.cldin.net`
		A	185.109.217.174^{🇳🇱 CLDIN-NL185.109.216.0/22}
			PTR	`dns-yh-10.dns.cldin.net`
NS	`ns-q.dns.yourhosting.eu`
		A	2a05:1500:702:5:1c00:c9ff:fe00:266e^{🇳🇱 CLDIN-NL2a05:1500::/29}
			PTR	`dns-yh-14.dns.cldin.net`
		A	92.63.174.6^{🇳🇱 CLDIN-NL92.63.168.0/21 PCextreme IPv4 Route}
			PTR	`dns-yh-14.dns.cldin.net`
NS	`ns-u.dns.yourhosting.nu`
		A	2a05:1500:fe00::c3ff:fe08:d006^{🇳🇱 NL-BIT2a05:1500:fe00::/40}
			PTR	`dns-yh-18.dns.cldin.net`
		A	195.8.208.6^{🇳🇱 NL-BIT195.8.208.0/23}
			PTR	`dns-yh-18.dns.cldin.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	`v=spf1 a mx include:_spf.yourfilter.nl -all`
SOA	`ns-d.dns.yourhosting.nl`hostmaster@firstfind.nl 2025-11-18 #2

`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=1777585526

Same first word

koorscholing.com

DNS History

13 records (6 active, 7 former)

●NSns-d.dns.yourhosting.nl2026-03-29 → 2026-04-30 · 3 obs

○ 2017-04-05 05:50:02
● 2026-03-29 22:21:38
● 2026-04-30 21:54:06

●NSns-q.dns.yourhosting.eu2026-03-29 → 2026-04-30 · 3 obs

○ 2017-04-05 05:50:02
● 2026-03-29 22:21:38
● 2026-04-30 21:54:06

●NSns-u.dns.yourhosting.nu2026-03-29 → 2026-04-30 · 3 obs

○ 2017-04-05 05:50:02
● 2026-03-29 22:21:38
● 2026-04-30 21:54:06

○NSns3.firstfind.nl2015-05-05 → 2017-04-05 · 4 obs

● 2015-05-05 10:08:36
● 2017-04-05 05:50:02
○ 2026-03-29 22:21:38
○ 2026-04-30 21:54:06

○NSns4.firstfind.nl2015-05-05 → 2017-04-05 · 4 obs

● 2015-05-05 10:08:36
● 2017-04-05 05:50:02
○ 2026-03-29 22:21:38
○ 2026-04-30 21:54:06

○NSns5.firstfind.net2015-05-05 → 2017-04-05 · 4 obs

● 2015-05-05 10:08:36
● 2017-04-05 05:50:02
○ 2026-03-29 22:21:38
○ 2026-04-30 21:54:06

●MXfallback.yourfilter.nl2026-03-29 → 2026-04-30 · 3 obs

○ 2017-04-05 05:50:02
● 2026-03-29 22:21:38
● 2026-04-30 21:54:06

○MXmx1.firstfind.nl2015-05-05 → 2017-04-05 · 4 obs

● 2015-05-05 10:08:36
● 2017-04-05 05:50:02
○ 2026-03-29 22:21:38
○ 2026-04-30 21:54:06

○MXmx2.firstfind.nl2015-05-05 → 2017-04-05 · 4 obs

● 2015-05-05 10:08:36
● 2017-04-05 05:50:02
○ 2026-03-29 22:21:38
○ 2026-04-30 21:54:06

●MXprimary.yourfilter.nl2026-03-29 → 2026-04-30 · 3 obs

○ 2017-04-05 05:50:02
● 2026-03-29 22:21:38
● 2026-04-30 21:54:06

○MXserver41.firstfind.nl2015-05-05 → 2017-04-05 · 4 obs

● 2015-05-05 10:08:36
● 2017-04-05 05:50:02
○ 2026-03-29 22:21:38
○ 2026-04-30 21:54:06

●A185.37.71.712026-03-29 → 2026-04-30 · 3 obs

○ 2017-04-05 05:50:02
● 2026-03-29 22:21:38
● 2026-04-30 21:54:06

○A85.158.203.62015-05-05 → 2017-04-05 · 4 obs

● 2015-05-05 10:08:36
● 2017-04-05 05:50:02
○ 2026-03-29 22:21:38
○ 2026-04-30 21:54:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	g.gtld-servers.net, l.gtld-servers.net, d.gtld-servers.net, e.gtld-servers.net...	-
koorscholing.com	ns-q.dns.yourhosting.eu, ns-d.dns.yourhosting.nl, ns-u.dns.yourhosting.nu	-

✅ Authoritative Response

Server:92.63.174.6

NS records: ns-q.dns.yourhosting.eu, ns-d.dns.yourhosting.nl, ns-u.dns.yourhosting.nu

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for koorscholing.com (unsigned zone)

⏱️ Timing

Total: 1968ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`185.37.71.71`
NS	3	`ns-q.dns.yourhosting.eu, ns-u.dns.yourhosting.nu...`
MX	2	`primary.yourfilter.nl (pri: 10), fallback.yourfilter.nl (pri: 20)`
TXT	1	`v=spf1 a mx include:_spf.yourfilter.nl -`
SOA	1	`ns-d.dns.yourhosting.nl hostmaster.first`

Analysis

IP Addresses

koorscholing.com points to a single IP: 185.37.71.71.

Other host names, for instance engelbronner.nl, moosenco.com, rianvisser.nl, epdapp.nl and studiodoen.nl share IP numbers with koorscholing.com.

Name Servers

koorscholing.com is delegated to three name servers: ns-q.dns.yourhosting.eu, ns-d.dns.yourhosting.nl and ns-u.dns.yourhosting.nu.

koorscholing.com partially shares name servers with other domains; examples include friendsindeed.nl, avunet.nl, postro.nl, bedrijfsuitjesutrecht.nl and vdkaaij.nl.

These name servers are commonly used alongside ns-i.dns.yourhosting.nu, ns-t.dns.yourhosting.eu, ns-w.dns.yourhosting.eu, ns-s.dns.yourhosting.nl, ns-v.dns.yourhosting.nl, ns-p.dns.yourhosting.nl, ns-g.dns.yourhosting.nl, ns-k.dns.yourhosting.eu, ns-m.dns.yourhosting.nl and ns-x.dns.yourhosting.nu.

Host names with two IP numbers:

ns-q.dns.yourhosting.eu points to 2a05:1500:702:5:1c00:c9ff:fe00:266e and 92.63.174.6.

ns-d.dns.yourhosting.nl points to 2a05:1500:600:5:1c00:e3ff:fe00:d52 and 185.109.217.174.

ns-u.dns.yourhosting.nu points to 2a05:1500:fe00::c3ff:fe08:d006 and 195.8.208.6.

Mail Servers

koorscholing.com is handled by two mail servers: fallback.yourfilter.nl and primary.yourfilter.nl.

koorscholing.com has the same mail server setup as other domains, including tonmulder.com, accuserviceholland.nl, sfinance.nl, circlened.nl and bepi.nl.

koorscholing.com shares some mail servers with other domains at least partially, for example reviszwembaden.nl, adtim.nl, reijn.nl and vop.nl.