cu4.nl - dns.ninja

`cu4.nl`

DNSSEC	⚠️ Not signed
NS	`ns0.transip.net` ⭐
		A	2a01:7c8:dddd:195::195^{🇳🇱 TRANSIP-AS2a01:7c8::/32 TransIP B.V. Amsterdam IPv6 network}
			PTR	`ns0.transip.net`
		A	195.135.195.195^{🇮🇹 TRANSIP-AS195.135.195.0/24 TransIP B.V.}
			PTR	`ns0.transip.net`
NS	`ns1.transip.nl`
		A	2a01:7c8:7000:195::195^{🇳🇱 TRANSIP-AS2a01:7c8::/32 TransIP B.V. Amsterdam IPv6 network}
			PTR	`ns1.transip.nl`
		A	195.8.195.195^{🇳🇱 TRANSIP-AS195.8.195.0/24 TransIP B.V.}
			PTR	`ns1.transip.nl`
NS	`ns2.transip.eu`
		A	2a01:7c8:f:c1f::195^{🇳🇱 TRANSIP-AS2a01:7c8::/32 TransIP B.V. Amsterdam IPv6 network}
			PTR	`ns2.transip.eu`
		A	37.97.199.195^{🇳🇱 TRANSIP-AS37.97.128.0/17 TransIP BV Amsterdam, The Netherlands}
			PTR	`ns2.transip.eu`
MX	`cu4-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:ca09::1^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-as9pr07cu00301.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::6^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am4pr0401cu00106.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::d^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-as9pr05cu01305.inbound.protection.outlook.com`
		A	52.101.73.2^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as9pr07cu00302.inbound.protection.outlook.com`
		A	52.101.73.4^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am0pr83cu00404.inbound.protection.outlook.com`
		A	52.101.73.24^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as8pr05cu00300.inbound.protection.outlook.com`
		A	52.101.73.30^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am7pr05cu00306.inbound.protection.outlook.com`
TXT	`MS=ms56130286`
TXT	`v=spf1 include:spf.protection.outlook.com -all`
SOA	`ns0.transip.net`hostmaster@transip.nl 2025-11-03 #1

`nl`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns1.dns.nl` ⭐
	NS	`ns3.dns.nl`
	NS	`ns4.dns.nl`
	TXT	`nl zone update: 2026-07-03 08:00:02 +0000 (EPOCH 1783065602)`
	SOA	`ns1.dns.nl`dns@sidn.nl 2026-07-03 #16

Same first word

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DNS History

10 records (4 active, 6 former)

●NSns0.transip.net2026-06-24 → 2026-07-03 · 3 obs

○ 2016-03-28 14:34:42
● 2026-06-24 13:14:04
● 2026-07-03 08:41:12

○NSns1.nxs.nl2015-08-04 → 2016-03-28 · 4 obs

● 2015-08-04 14:40:54
● 2016-03-28 14:34:42
○ 2026-06-24 13:14:04
○ 2026-07-03 08:41:12

●NSns1.transip.nl2026-06-24 → 2026-07-03 · 3 obs

○ 2016-03-28 14:34:42
● 2026-06-24 13:14:04
● 2026-07-03 08:41:12

○NSns2.nxs.nl2015-08-04 → 2016-03-28 · 4 obs

● 2015-08-04 14:40:54
● 2016-03-28 14:34:42
○ 2026-06-24 13:14:04
○ 2026-07-03 08:41:12

●NSns2.transip.eu2026-06-24 → 2026-07-03 · 3 obs

○ 2016-03-28 14:34:42
● 2026-06-24 13:14:04
● 2026-07-03 08:41:12

○NSns3.nxs.nl2015-08-04 → 2016-03-28 · 4 obs

● 2015-08-04 14:40:54
● 2016-03-28 14:34:42
○ 2026-06-24 13:14:04
○ 2026-07-03 08:41:12

●MXcu4-nl.mail.protection.outlook.com2026-06-24 → 2026-07-03 · 3 obs

○ 2016-03-28 14:34:42
● 2026-06-24 13:14:04
● 2026-07-03 08:41:12

○MXlb.mailscanner.nxs.nl2015-08-04 → 2016-03-28 · 4 obs

● 2015-08-04 14:40:54
● 2016-03-28 14:34:42
○ 2026-06-24 13:14:04
○ 2026-07-03 08:41:12

○MXmail.cu4xs.com2015-08-04 → 2016-03-28 · 4 obs

● 2015-08-04 14:40:54
● 2016-03-28 14:34:42
○ 2026-06-24 13:14:04
○ 2026-07-03 08:41:12

○A217.115.192.152015-08-04 → 2016-03-28 · 4 obs

● 2015-08-04 14:40:54
● 2016-03-28 14:34:42
○ 2026-06-24 13:14:04
○ 2026-07-03 08:41:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
nl	ns1.dns.nl, ns3.dns.nl, ns4.dns.nl	-
cu4.nl	ns0.transip.net, ns1.transip.nl, ns2.transip.eu	2 records

✅ Authoritative Response

Server:37.97.199.195

NS records: ns0.transip.net, ns1.transip.nl, ns2.transip.eu

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 714ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	3	`ns1.transip.nl, ns0.transip.net...`
MX	1	`cu4-nl.mail.protection.outlook.com (pri:`
TXT	2	`v=spf1 include:spf.protection.outlook.co, MS=ms56130286`
SOA	1	`ns0.transip.net hostmaster.transip.nl`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1.transip.nl, ns1.transip.nl)

Analysis

Name Servers

cu4.nl is delegated to three name servers: ns2.transip.eu, ns0.transip.net and ns1.transip.nl.

At least some of cu4.nl's name servers are shared with other domains, for example basleijenhorst.com, klarinet.eu, hcc-pgg.nl and two more.

ns2.transip.eu, ns0.transip.net and ns1.transip.nl each resolve to two IP addresses: ns2.transip.eu resolves to 37.97.199.195 and 2a01:7c8:f:c1f::195; ns0.transip.net resolves to 195.135.195.195 and 2a01:7c8:dddd:195::195; ns1.transip.nl resolves to 195.8.195.195 and 2a01:7c8:7000:195::195.

Mail Servers

The sole mail server for cu4.nl is cu4-nl.mail.protection.outlook.com.

With 8 IP addresses total, cu4-nl.mail.protection.outlook.com resolves to 52.101.73.2, 52.101.73.4, 52.101.73.24 and 5 others.