`educourse.nl`

DNSSEC	⚠️ Not signed
A	87.233.198.170^{🇳🇱 TrueServer-AS87.233.192.0/18 True}
		PTR	`asp-shared-ip.true.nl`
NS	`auth01.dns.trueserver.nl` ⭐
		A	2001:9a8:0:10::2^{🇳🇱 TrueServer-AS2001:9a8::/32 TrueServer BV}
			PTR	`auth01.dns.trueserver.nl`
		A	213.193.210.2^{🇳🇱 TrueServer-AS213.193.210.0/24}
			PTR	`auth01.dns.trueserver.nl`
NS	`auth02.dns.trueserver.nl`
		A	2001:9a8:0:11::2^{🇳🇱 TrueServer-AS2001:9a8::/32 TrueServer BV}
			PTR	`auth02.dns.trueserver.nl`
		A	193.28.152.2^{🇳🇱 TrueServer-AS193.28.152.0/24 TrueServer BV}
			PTR	`auth02.dns.trueserver.nl`
NS	`auth03.dns.trueserver.nl`
		A	2001:9a8:0:12::2^{🇳🇱 TrueServer-AS2001:9a8::/32 TrueServer BV}
			PTR	`auth03.dns.trueserver.nl`
		A	213.239.136.2^{🇳🇱 TrueServer-AS213.239.136.0/24}
			PTR	`auth03.dns.trueserver.nl`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c1b::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`wv-in-f27.1e100.net`
		A	142.251.111.26^{🇺🇸 Google142.251.111.0/24}
			PTR	`bk-in-f26.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽²⁰⁾
		A	2800:3f0:4003:c0f::1b^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.26^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f26.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽²⁰⁾
		A	2a00:1450:400b:c02::1a^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f26.1e100.net`
		A	172.253.116.27^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f27.1e100.net`
MX	`aspmx2.googlemail.com`⁽⁵⁰⁾
		A	2800:3f0:4003:c0f::1a^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.27^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f27.1e100.net`
MX	`aspmx3.googlemail.com`⁽⁵⁰⁾
		A	2a00:1450:400b:c02::1a^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f26.1e100.net`
		A	172.253.116.26^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f26.1e100.net`
SOA	`auth01.dns.trueserver.nl`hostmaster@trueserver.nl 2026-01-15 #1

`nl`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns1.dns.nl` ⭐
	NS	`ns3.dns.nl`
	NS	`ns4.dns.nl`
	TXT	`nl zone update: 2026-04-23 23:00:02 +0000 (EPOCH 1776985202)`
	SOA	`ns1.dns.nl`dns@sidn.nl 2026-04-23 #46

🔒 HSTS Preload (+subdomains)

Same first word

educourse.nl

educourse.co.za

educourse.com

educourse.tj

Similar names

duecourse.tempurl.host

edusource.de

sourceedu.com

edusource.co.in

edusource.ca

edusource.net

courseedu.com

duecourse.com

duosecure.com

edusource.org

edusource.us

edusource.com

DNS History

9 records (9 active, 0 former)

●NSauth01.dns.trueserver.nl2026-04-15 → 2026-04-23 · 2 obs

● 2026-04-15 13:15:42
● 2026-04-23 23:49:08

●NSauth02.dns.trueserver.nl2026-04-15 → 2026-04-23 · 2 obs

● 2026-04-15 13:15:42
● 2026-04-23 23:49:08

●NSauth03.dns.trueserver.nl2026-04-15 → 2026-04-23 · 2 obs

● 2026-04-15 13:15:42
● 2026-04-23 23:49:08

●MXalt1.aspmx.l.google.com2026-04-15 → 2026-04-23 · 2 obs

● 2026-04-15 13:15:42
● 2026-04-23 23:49:08

●MXalt2.aspmx.l.google.com2026-04-15 → 2026-04-23 · 2 obs

● 2026-04-15 13:15:42
● 2026-04-23 23:49:08

●MXaspmx.l.google.com2026-04-15 → 2026-04-23 · 2 obs

● 2026-04-15 13:15:42
● 2026-04-23 23:49:08

●MXaspmx2.googlemail.com2026-04-15 → 2026-04-23 · 2 obs

● 2026-04-15 13:15:42
● 2026-04-23 23:49:08

●MXaspmx3.googlemail.com2026-04-15 → 2026-04-23 · 2 obs

● 2026-04-15 13:15:42
● 2026-04-23 23:49:08

●A87.233.198.1702026-04-15 → 2026-04-23 · 2 obs

● 2026-04-15 13:15:42
● 2026-04-23 23:49:08

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
nl	ns1.dns.nl, ns3.dns.nl, ns4.dns.nl	-
educourse.nl	auth01.dns.trueserver.nl, auth02.dns.trueserver.nl, auth03.dns.trueserver.nl	6 records

✅ Authoritative Response

Server:213.239.136.2

NS records: auth01.dns.trueserver.nl, auth02.dns.trueserver.nl, auth03.dns.trueserver.nl

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 419ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`87.233.198.170`
NS	3	`auth01.dns.trueserver.nl, auth03.dns.trueserver.nl...`
MX	5	`ASPMX.L.GOOGLE.COM (pri: 10), ALT2.ASPMX.L.GOOGLE.COM (pri: 20)...`
SOA	1	`auth01.dns.trueserver.nl hostmaster.true`

📌 Glue Records Collected

Total: 6

Out-of-bailiwick: 6 (auth01.dns.trueserver.nl, auth01.dns.trueserver.nl, auth02.dns.trueserver.nl...)

Analysis

IP Addresses

educourse.nl points to a single IP number: 87.233.198.170.

Name Servers

The domain educourse.nl is delegated to three name servers: auth01.dns.trueserver.nl, auth02.dns.trueserver.nl and auth03.dns.trueserver.nl.

educourse.nl shares name servers with other domains at least partially, for instance mercursim.com, in2-psy.nl, kunsthandelhanvos.nl, mailone.nl and parasol.nl.