`concentia.dk`

DNSSEC	🔒 Signed (DS record present)
A	2a02:2350:5:102:80ac:3a05:d5ab:a7ae^{🇩🇰 ONECOM2a02:2350::/32 One.com A/S}
NS	`ns01.one.com` ⭐
		A	2001:67c:28cc::10^{ONECOM-INFRA2001:67c:28cc::/48}
			PTR	`ns01.one.com`
		A	195.206.121.10^{ONECOM-INFRA195.206.121.0/24}
			PTR	`ns01.one.com`
NS	`ns02.one.com`
		A	2001:67c:3c0::10^{🇩🇰 ONECOM2001:67c:3c0::/48}
			PTR	`ns02.one.com`
		A	185.10.11.10^{ONECOM185.10.11.0/24}
			PTR	`ns02.one.com`
MX	`concentia-dk.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::7^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db4pr02cu00307.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::5^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am1pr04cu00105.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::7^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am9pr04cu00107.inbound.protection.outlook.com`
		A	52.101.68.3^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db7pr03cu00403.inbound.protection.outlook.com`
		A	52.101.68.39^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db7pr03cu00607.inbound.protection.outlook.com`
		A	52.101.73.11^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am1pr04cu00103.inbound.protection.outlook.com`
		A	52.101.73.16^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as2pr05cu00100.inbound.protection.outlook.com`
TXT	`25.04.2022`
TXT	`MS=ms87946761`
TXT	`v=spf1 include:spf.protection.outlook.com -all`
SOA	`ns01.one.com`hostmaster@one.com 2026-06-02 #2

`dk`

	DNSSEC	🔒 Signed (DS record present)
	NS	`b.nic.dk` ⭐
	NS	`c.nic.dk`
	NS	`h.nic.dk`
	NS	`l.nic.dk`
	NS	`s.nic.dk`
	NS	`t.nic.dk`
	TXT	`DK zone updateEpoch 1781649361localtime Wed Jun 17 00:36:01 2026gmtime Tue Ju...`
	SOA	`b.nic.dk`tech@punktum.dk serial=1781649361

Subdomains

www.concentia.dk

Same first word

concentia.dk

Similar names

DNS History

12 records (4 active, 8 former)

●NSns01.one.com2026-06-09 → 2026-06-16 · 3 obs

○ 2016-10-16 13:20:10
● 2026-06-09 23:44:28
● 2026-06-16 23:07:10

●NSns02.one.com2026-06-09 → 2026-06-16 · 3 obs

○ 2016-10-16 13:20:10
● 2026-06-09 23:44:28
● 2026-06-16 23:07:10

○NSns1.gratisdns.dk2015-05-24 → 2016-10-16 · 4 obs

● 2015-05-24 00:02:00
● 2016-10-16 13:20:10
○ 2026-06-09 23:44:28
○ 2026-06-16 23:07:10

○NSns2.gratisdns.dk2015-05-24 → 2016-10-16 · 4 obs

● 2015-05-24 00:02:00
● 2016-10-16 13:20:10
○ 2026-06-09 23:44:28
○ 2026-06-16 23:07:10

○NSns3.gratisdns.dk2015-05-24 → 2016-10-16 · 4 obs

● 2015-05-24 00:02:00
● 2016-10-16 13:20:10
○ 2026-06-09 23:44:28
○ 2026-06-16 23:07:10

○NSns4.gratisdns.dk2015-05-24 → 2016-10-16 · 4 obs

● 2015-05-24 00:02:00
● 2016-10-16 13:20:10
○ 2026-06-09 23:44:28
○ 2026-06-16 23:07:10

○NSns5.gratisdns.dk2015-05-24 → 2016-10-16 · 4 obs

● 2015-05-24 00:02:00
● 2016-10-16 13:20:10
○ 2026-06-09 23:44:28
○ 2026-06-16 23:07:10

●MXconcentia-dk.mail.protection.outlook.com2026-06-09 → 2026-06-16 · 3 obs

○ 2016-10-16 13:20:10
● 2026-06-09 23:44:28
● 2026-06-16 23:07:10

○MXgw1.security.comendo.com2015-05-24 → 2016-10-16 · 4 obs

● 2015-05-24 00:02:00
● 2016-10-16 13:20:10
○ 2026-06-09 23:44:28
○ 2026-06-16 23:07:10

○MXgw2.security.comendo.com2015-05-24 → 2016-10-16 · 4 obs

● 2015-05-24 00:02:00
● 2016-10-16 13:20:10
○ 2026-06-09 23:44:28
○ 2026-06-16 23:07:10

○MXgw3.security.comendo.com2015-05-24 → 2016-10-16 · 4 obs

● 2015-05-24 00:02:00
● 2016-10-16 13:20:10
○ 2026-06-09 23:44:28
○ 2026-06-16 23:07:10

●A2a02:2350:5:102:80ac:3a05:d5ab:a7ae2026-06-09 → 2026-06-16 · 2 obs

● 2026-06-09 23:44:28
● 2026-06-16 23:07:10

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dk	b.nic.dk, c.nic.dk, h.nic.dk, l.nic.dk...	-
concentia.dk	ns01.one.com, ns02.one.com	-

✅ Authoritative Response

Server:195.206.121.10

NS records: ns01.one.com, ns02.one.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 808ms | Queries: -

📄 Records

Type	Count	Sample Data
AAAA	1	`2a02:2350:5:102:80ac:3a05:d5ab:a7ae`
NS	2	`ns01.one.com, ns02.one.com`
MX	1	`concentia-dk.mail.protection.outlook.com`
TXT	3	`25.04.2022, MS=ms87946761...`
SOA	1	`ns01.one.com hostmaster.one.com`

Analysis

Hierarchy

The domain www.concentia.dk falls under the parent concentia.dk.

IP Addresses

concentia.dk points to a single IP number: 2a02:2350:5:102:80ac:3a05:d5ab:a7ae.

Host names like www.concentia.dk are further examples that share IP numbers with concentia.dk.

Name Servers

Two name servers handle the delegation for concentia.dk: ns01.one.com and ns02.one.com.

concentia.dk shares its name server setup with other domains, including restaurantesmexicanos.net, michaelbeha.dk, wirum.net and two others.

ns01.one.com and ns02.one.com both carry two IP addresses. The A records for ns01.one.com are 195.206.121.10 and 2001:67c:28cc::10; the A records for ns02.one.com are 185.10.11.10 and 2001:67c:3c0::10.

Mail Servers

concentia.dk has one mail server: concentia-dk.mail.protection.outlook.com.

concentia-dk.mail.protection.outlook.com points to 8 IP numbers: 52.101.68.3, 52.101.68.39, 52.101.73.11 and 5 other.

concentia.dk - robtex.com

concentia.dk

dk

Subdomains

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

Hierarchy

IP Addresses

Name Servers

Mail Servers

`concentia.dk`

`dk`