cssn.nl - dns.ninja

`cssn.nl`

DNSSEC	⚠️ Not signed
NS	`ns1.dnstools.nl` ⭐
		A	2a02:728:e:66::100^{🇳🇱 UNISERVER-AS2a02:728::/32}
			PTR	`ns1.dnstools.nl`
		A	81.26.219.100^{🇳🇱 UNISERVER-AS81.26.208.0/20}
			PTR	`ns1.dnstools.nl`
NS	`ns2.dnstools.nl`
		A	2a02:728:e:758::160^{🇳🇱 UNISERVER-AS2a02:728::/32}
			PTR	`ns2.dnstools.nl`
		A	81.26.208.160^{🇳🇱 UNISERVER-AS81.26.208.0/20}
			PTR	`ns2.dnstools.nl`
MX	`cssn-nl.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::a^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-du0pr03cu00102.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::c^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db9pr02cu00204.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::e^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am7pr05cu00206.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::20^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-as8pr05cu00400.inbound.protection.outlook.com`
		A	52.101.68.12^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db9pr02cu00204.inbound.protection.outlook.com`
		A	52.101.68.36^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db5pr02cu00104.inbound.protection.outlook.com`
		A	52.101.73.1^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am3pr04cu00501.inbound.protection.outlook.com`
		A	52.101.73.30^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am7pr05cu00306.inbound.protection.outlook.com`
TXT	`v=spf1 include:spf.protection.outlook.com -all`
SOA	`ns1.dnstools.nl`systeembeheer@easyhosting.nl 2023-11-08 #0

`nl`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns1.dns.nl` ⭐
	NS	`ns3.dns.nl`
	NS	`ns4.dns.nl`
	TXT	`nl zone update: 2026-08-09 18:30:01 +0000 (EPOCH 1786300201)`
	SOA	`ns1.dns.nl`dns@sidn.nl 2026-08-09 #37

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DNS History

5 records (3 active, 2 former)

○NSns1.cssn.nl2015-08-02 → 2021-02-14 · 4 obs

● 2015-08-02 02:40:44
● 2021-02-14 14:00:10
○ 2026-02-16 12:42:00
○ 2026-08-09 19:39:48

●NSns1.dnstools.nl2026-02-16 → 2026-08-09 · 3 obs

○ 2021-02-14 14:00:10
● 2026-02-16 12:42:00
● 2026-08-09 19:39:48

○NSns2.cssn.nl2015-08-02 → 2021-02-14 · 4 obs

● 2015-08-02 02:40:44
● 2021-02-14 14:00:10
○ 2026-02-16 12:42:00
○ 2026-08-09 19:39:48

●NSns2.dnstools.nl2026-02-16 → 2026-08-09 · 3 obs

○ 2021-02-14 14:00:10
● 2026-02-16 12:42:00
● 2026-08-09 19:39:48

●MXcssn-nl.mail.protection.outlook.com2015-08-02 → 2026-08-09 · 2 obs

● 2015-08-02 02:40:44
● 2026-08-09 19:39:48

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
nl	ns4.dns.nl, ns3.dns.nl, ns1.dns.nl	-
cssn.nl	ns1.dnstools.nl, ns2.dnstools.nl	4 records

✅ Authoritative Response

Server:81.26.208.160

NS records: ns1.dnstools.nl, ns2.dnstools.nl

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cssn.nl (unsigned zone)

⏱️ Timing

Total: 326ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`ns1.dnstools.nl, ns2.dnstools.nl`
MX	1	`cssn-nl.mail.protection.outlook.com (pri`
TXT	1	`v=spf1 include:spf.protection.outlook.co`
SOA	1	`ns1.dnstools.nl systeembeheer.easyhostin`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns1.dnstools.nl, ns1.dnstools.nl, ns2.dnstools.nl...)

Analysis

Name Servers

cssn.nl has two authoritative name servers — ns1.dnstools.nl and ns2.dnstools.nl.

cssn.nl uses the same name servers as several other domains — among them assessmentee.com, lexonomics.nl, e-interim.nl and two more.

cssn.nl shares at least some of its name servers with other domains, including go2flex.com, joris-software.nl, dontvote.eu and two others.

These name servers are frequently seen alongside ns1.da07.easyhosting.nl, ns2.da07.easyhosting.nl, ns1.yachtfocus.cloud and 5 other name servers.

Both ns1.dnstools.nl and ns2.dnstools.nl have two IP addresses each. ns1.dnstools.nl resolves to 81.26.219.100 and 2a02:728:e:66::100; ns2.dnstools.nl resolves to 81.26.208.160 and 2a02:728:e:758::160.

Mail Servers

Mail for cssn.nl is handled by a single mail server, cssn-nl.mail.protection.outlook.com.

cssn-nl.mail.protection.outlook.com resolves to 8 IP addresses — 52.101.68.12, 52.101.68.36, 52.101.73.1 and 5 others.