`cosec.nl`

DNSSEC	⚠️ Not signed
A	2a00:1c98:1000:10f2:0:4:537e:d0d5^{🇧🇪 COMBELL-AS2a00:1c98::/32 COMBELL Network}
A	83.217.71.159^{🇧🇪 COMBELL-AS83.217.64.0/19 Combell Network}
NS	`ns1.european-server.eu` ⭐ ⚠️ Not in parent delegation
		A	2a00:1c98:50::50^{🇧🇪 COMBELL-AS2a00:1c98:50::/44}
		A	89.44.166.48^{🇧🇪 COMBELL-AS89.44.166.0/23 Combell Network}
			PTR	`89.44.166.48.static.hosted.by.combell-ops.net`
NS	`ns1.combell.eu` ⚠️ Not in zone NS records
		A	2a00:1c98:50::50^{🇧🇪 COMBELL-AS2a00:1c98:50::/44}
		A	89.44.166.48^{🇧🇪 COMBELL-AS89.44.166.0/23 Combell Network}
			PTR	`89.44.166.48.static.hosted.by.combell-ops.net`
NS	`ns3.combell.net` ⚠️ Not in zone NS records
		A	2a00:1c98::53:1^{🇧🇪 COMBELL-AS2a00:1c98::/32 COMBELL Network}
			PTR	`ns3.combell.net`
		A	83.217.73.172^{🇧🇪 COMBELL-AS83.217.64.0/19 Combell Network}
			PTR	`ns3.combell.net`
NS	`ns3.european-server.com` ⚠️ Not in parent delegation
		A	2a00:1c98::53:1^{🇧🇪 COMBELL-AS2a00:1c98::/32 COMBELL Network}
			PTR	`ns3.combell.net`
		A	83.217.73.172^{🇧🇪 COMBELL-AS83.217.64.0/19 Combell Network}
			PTR	`ns3.combell.net`
NS	`ns4.combell.net` ⚠️ Not in zone NS records
		A	2001:1598:0:101::3^{🇧🇪 EASYHOST-COLO-AS2001:1598::/32 Easyhost Network}
			PTR	`ns4.combell.net`
		A	86.39.202.67^{🇧🇪 EASYHOST-COLO-AS86.39.128.0/17 Easyhost Network}
			PTR	`ns4.combell.net`
NS	`ns4.european-server.com` ⚠️ Not in parent delegation
		A	2001:1598:0:101::3^{🇧🇪 EASYHOST-COLO-AS2001:1598::/32 Easyhost Network}
			PTR	`ns4.combell.net`
		A	86.39.202.67^{🇧🇪 EASYHOST-COLO-AS86.39.128.0/17 Easyhost Network}
			PTR	`ns4.combell.net`
MX	`cosec-nl.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::6^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db4pr02cu00406.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::8^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db5pr02cu00100.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::e^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db8pr02cu00106.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::4^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am0pr04cu00504.inbound.protection.outlook.com`
		A	52.101.68.8^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-du0pr03cu00100.inbound.protection.outlook.com`
		A	52.101.68.25^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db8pr02cu00101.inbound.protection.outlook.com`
		A	52.101.73.2^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as9pr07cu00302.inbound.protection.outlook.com`
		A	52.101.73.19^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as8pr04cu00803.inbound.protection.outlook.com`
TXT	`v=spf1 mx a include:spf.totaalholding.nl include:spf.protection.outlook.com i...`
TXT	`MS=ms47599497`
SOA	`ns1.european-server.eu`hostmaster@cosec.nl serial=1781544708

`nl`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns1.dns.nl` ⭐
	NS	`ns3.dns.nl`
	NS	`ns4.dns.nl`
	TXT	`nl zone update: 2026-08-04 02:00:02 +0000 (EPOCH 1785808802)`
	SOA	`ns1.dns.nl`dns@sidn.nl 2026-08-04 #4

Same first word

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cosec.nl

cosec.com.au

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cosec.online

cosec.com.my

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Similar names

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cecos.org

cecos.com

secco.us

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cecso.com.mx

secco.pl

eccos.cl

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ccseo.cc

ecsoc.com

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secco.com.cn

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cesoc.com

cesco.ch

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secco.se

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ecocs.jp

cesoc.fr

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sccoe.k12.ca.us

cscoe.org

secco.gr

cesco.com.mx

seocc.com

sccoe.net

eccos.org

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oeccs.com

escco.co.jp

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osecc.ca

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scceo.net

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eccos.ru

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ecsoc.org

coesc.org

escco.com.cn

csoec.fr

escoc.com

cesco.cl

cesco.eu

cecos.net

secco.ru

ecsoc.ru

secoc.com

secco.ai

cecos.eu

secco.adm.br

escco.in

cscoe.com

cesoc.de

cesco.org

cesco.pl

escco.org

DNS History

16 records (9 active, 7 former)

○NSchristina.neostrada.nl2015-06-07 → 2021-03-30 · 4 obs

● 2015-06-07 16:13:42
● 2021-03-30 21:23:24
○ 2026-06-23 00:12:54
○ 2026-08-04 03:06:28

○NSlisa.neostrada.nl2015-06-07 → 2021-03-30 · 4 obs

● 2015-06-07 16:13:42
● 2021-03-30 21:23:24
○ 2026-06-23 00:12:54
○ 2026-08-04 03:06:28

●NSns1.combell.eu2026-06-23 → 2026-08-04 · 3 obs

○ 2021-03-30 21:23:24
● 2026-06-23 00:12:54
● 2026-08-04 03:06:28

●NSns1.european-server.eu2026-06-23 → 2026-08-04 · 3 obs

○ 2021-03-30 21:23:24
● 2026-06-23 00:12:54
● 2026-08-04 03:06:28

●NSns3.combell.net2026-06-23 → 2026-08-04 · 3 obs

○ 2021-03-30 21:23:24
● 2026-06-23 00:12:54
● 2026-08-04 03:06:28

●NSns3.european-server.com2026-06-23 → 2026-08-04 · 3 obs

○ 2021-03-30 21:23:24
● 2026-06-23 00:12:54
● 2026-08-04 03:06:28

●NSns4.combell.net2026-06-23 → 2026-08-04 · 3 obs

○ 2021-03-30 21:23:24
● 2026-06-23 00:12:54
● 2026-08-04 03:06:28

●NSns4.european-server.com2026-06-23 → 2026-08-04 · 3 obs

○ 2021-03-30 21:23:24
● 2026-06-23 00:12:54
● 2026-08-04 03:06:28

○NSsandra.neostrada.nl2015-06-07 → 2021-03-30 · 4 obs

● 2015-06-07 16:13:42
● 2021-03-30 21:23:24
○ 2026-06-23 00:12:54
○ 2026-08-04 03:06:28

●MXcosec-nl.mail.protection.outlook.com2026-06-23 → 2026-08-04 · 3 obs

○ 2021-03-30 21:23:24
● 2026-06-23 00:12:54
● 2026-08-04 03:06:28

○MXmail.cosec.nl2015-06-07 → 2021-03-30 · 4 obs

● 2015-06-07 16:13:42
● 2021-03-30 21:23:24
○ 2026-06-23 00:12:54
○ 2026-08-04 03:06:28

○A185.94.230.2412020-01-15 → 2021-03-30 · 5 obs

○ 2017-02-12 03:51:12
● 2020-01-15 17:35:30
● 2021-03-30 21:23:24
○ 2026-06-23 00:12:54
○ 2026-08-04 03:06:28

●A2a00:1c98:1000:10f2:0:4:537e:d0d52026-06-23 → 2026-08-04 · 3 obs

○ 2021-03-30 21:23:24
● 2026-06-23 00:12:54
● 2026-08-04 03:06:28

○A2a00:f10:13f:0:1c00:5eff:fe00:1de2020-01-15 → 2021-03-30 · 5 obs

○ 2017-02-12 03:51:12
● 2020-01-15 17:35:30
● 2021-03-30 21:23:24
○ 2026-06-23 00:12:54
○ 2026-08-04 03:06:28

○A31.186.174.1182015-06-07 → 2017-02-12 · 4 obs

● 2015-06-07 16:13:42
● 2017-02-12 03:51:12
○ 2020-01-15 17:35:30
○ 2026-08-04 03:06:28

●A83.217.71.1592026-06-23 → 2026-08-04 · 3 obs

○ 2021-03-30 21:23:24
● 2026-06-23 00:12:54
● 2026-08-04 03:06:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
nl	ns1.dns.nl, ns3.dns.nl, ns4.dns.nl	-
cosec.nl	ns1.combell.eu, ns3.combell.net, ns4.combell.net	-

✅ Authoritative Response

Server:86.39.202.67

NS records: ns1.combell.eu, ns3.combell.net, ns4.combell.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cosec.nl (unsigned zone)

⏱️ Timing

Total: 643ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`83.217.71.159`
AAAA	1	`2a00:1c98:1000:10f2:0:4:537e:d0d5`
NS	3	`ns3.european-server.com, ns1.european-server.eu...`
MX	1	`cosec-nl.mail.protection.outlook.com (pr`
TXT	2	`v=spf1 mx a include:spf.totaalholding.nl, MS=ms47599497`
SOA	1	`ns1.european-server.eu hostmaster.cosec.`

Analysis

IP Addresses

cosec.nl points to the IP addresses 83.217.71.159 and 2a00:1c98:1000:10f2:0:4:537e:d0d5

Other hosts including perdu.nl, bikemike.nl and coldmetalspray.eu share IP addresses with cosec.nl.

Name Servers

cosec.nl has 6 name servers — ns3.european-server.com, ns4.european-server.com, ns1.combell.eu and 3 others.

The name servers of cosec.nl overlap at least partially with those of other domains — among them racompany.be, rotterdam-thehagueairport.nl, belsar.be and two more.

It is common to find these name servers alongside the name servers ns3.combell.net, ns4.combell.net, ns1.european-server.eu and two others.

Hostnames that resolve to two IP addresses:

ns3.european-server.com resolves to 83.217.73.172 and 2a00:1c98::53:1.

ns4.european-server.com resolves to 86.39.202.67 and 2001:1598:0:101::3.

ns1.combell.eu resolves to 89.44.166.48 and 2a00:1c98:50::50.

ns1.european-server.eu resolves to 89.44.166.48 and 2a00:1c98:50::50.

ns3.combell.net resolves to 83.217.73.172 and 2a00:1c98::53:1.

ns4.combell.net resolves to 86.39.202.67 and 2001:1598:0:101::3.

The host names ns3.european-server.com and ns3.combell.net both resolve to 2a00:1c98::53:1 IP addresses.

The host names ns3.european-server.com and ns3.combell.net both resolve to 83.217.73.172 IP addresses.

The host names ns4.european-server.com and ns4.combell.net both resolve to 2001:1598:0:101::3 IP addresses.

The host names ns4.european-server.com and ns4.combell.net both resolve to 86.39.202.67 IP addresses.

The host names ns1.combell.eu and ns1.european-server.eu both resolve to 2a00:1c98:50::50 IP addresses.

The host names ns1.combell.eu and ns1.european-server.eu both resolve to 89.44.166.48 IP addresses.

Mail Servers

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

cosec-nl.mail.protection.outlook.com resolves to 8 IP addresses — 52.101.68.8, 52.101.68.25, 52.101.73.2 and 5 others.

cosec.nl - robtex.com

cosec.nl

nl

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

Mail Servers

`cosec.nl`

`nl`