`concentra.nl`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::ac43:deb3^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::6815:1930^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.25.48^{Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.222.179^{🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`alexis.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b3c^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alexis.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c13c^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`alexis.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:213c^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`alexis.ns.cloudflare.com`
		A	108.162.193.60^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alexis.ns.cloudflare.com`
		A	172.64.33.60^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alexis.ns.cloudflare.com`
		A	173.245.59.60^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alexis.ns.cloudflare.com`
NS	`lila.ns.cloudflare.com`
		A	2606:4700:50::adf5:3aba^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lila.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0ba^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`lila.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20ba^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`lila.ns.cloudflare.com`
		A	108.162.192.186^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lila.ns.cloudflare.com`
		A	172.64.32.186^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lila.ns.cloudflare.com`
		A	173.245.58.186^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lila.ns.cloudflare.com`
MX	`concentra-nl.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:ca04::d^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db6pr03cu00105.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::4^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am0pr04cu00504.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::6^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am4pr0401cu00106.inbound.protection.outlook.com`
		A	52.101.68.18^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db4pr02cu00302.inbound.protection.outlook.com`
		A	52.101.68.32^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db3pr0202cu00200.inbound.protection.outlook.com`
		A	52.101.73.12^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am4pr0401cu00104.inbound.protection.outlook.com`
		A	52.101.73.26^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as9pr05cu01302.inbound.protection.outlook.com`
TXT	`IX6siCUP2sZmvkWrm+7d+0bbGEzXdSE4SRJp0UsHVmJMTlKiEpn2LFv94peuCjuLAFmfn3PeqYk37...`
TXT	`MS=ms53512372`
TXT	`adobe-idp-site-verification=2874515d68b0370803179f9e8d6698cb503e00756499a6e7a...`
TXT	`v=spf1 include:rlyhosts.be include:spf.vummail.be include:spf.protection.outl...`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.25.48, 172.67.222.179
		IPv6 hints	2606:4700:3033::ac43:deb3, 2606:4700:3037::6815:1930
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=244, name=cloudflare-ech.com
SOA	`alexis.ns.cloudflare.com`dns@cloudflare.com serial=2406659326

`nl`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns1.dns.nl` ⭐
	NS	`ns3.dns.nl`
	NS	`ns4.dns.nl`
	TXT	`nl zone update: 2026-07-15 04:00:02 +0000 (EPOCH 1784088002)`
	SOA	`ns1.dns.nl`dns@sidn.nl 2026-07-15 #8

Same first word

concentra.cz

concentra.com.do

concentra.international

concentra.co.ao

concentra.host

concentra.co.uk

concentra.biz

concentra.com.mx

concentra.us

concentra.nl

concentra.sk

concentra.co

concentra.de

concentra.today

concentra.hu

concentra.es

concentra.fi

concentra.ch

concentra.ca

concentra.mx

concentra.edu.do

concentra.dk

concentra.io

concentra.pt

concentra.company

concentra.be

concentra.no

concentra.in

concentra.eu

concentra.net

concentra.org

concentra.com

concentra.se

Similar names

DNS History

17 records (7 active, 10 former)

●NSalexis.ns.cloudflare.com2026-06-11 → 2026-07-15 · 3 obs

○ 2017-01-04 22:20:40
● 2026-06-11 10:58:26
● 2026-07-15 04:58:42

●NSlila.ns.cloudflare.com2026-06-11 → 2026-07-15 · 3 obs

○ 2017-01-04 22:20:40
● 2026-06-11 10:58:26
● 2026-07-15 04:58:42

○NSns.be.hostbasket.com2015-07-22 → 2016-01-15 · 4 obs

● 2015-07-22 15:42:52
● 2016-01-15 06:28:14
○ 2016-06-12 09:52:44
○ 2026-07-15 04:58:42

○NSns.fr.hostbasket.com2015-07-22 → 2016-01-15 · 4 obs

● 2015-07-22 15:42:52
● 2016-01-15 06:28:14
○ 2016-06-12 09:52:44
○ 2026-07-15 04:58:42

○NSns.nl.hostbasket.com2015-07-22 → 2016-01-15 · 4 obs

● 2015-07-22 15:42:52
● 2016-01-15 06:28:14
○ 2016-06-12 09:52:44
○ 2026-07-15 04:58:42

○NSns1.register.be2016-06-12 → 2017-01-04 · 5 obs

○ 2016-01-15 06:28:14
● 2016-06-12 09:52:44
● 2017-01-04 22:20:40
○ 2026-06-11 10:58:26
○ 2026-07-15 04:58:42

○NSns2.register.be2016-06-12 → 2017-01-04 · 5 obs

○ 2016-01-15 06:28:14
● 2016-06-12 09:52:44
● 2017-01-04 22:20:40
○ 2026-06-11 10:58:26
○ 2026-07-15 04:58:42

○NSns3.register.be2016-06-12 → 2017-01-04 · 5 obs

○ 2016-01-15 06:28:14
● 2016-06-12 09:52:44
● 2017-01-04 22:20:40
○ 2026-06-11 10:58:26
○ 2026-07-15 04:58:42

●MXconcentra-nl.mail.protection.outlook.com2026-06-11 → 2026-07-15 · 3 obs

○ 2017-01-04 22:20:40
● 2026-06-11 10:58:26
● 2026-07-15 04:58:42

○MXsmtp.corelio.be2015-07-22 → 2017-01-04 · 4 obs

● 2015-07-22 15:42:52
● 2017-01-04 22:20:40
○ 2026-06-11 10:58:26
○ 2026-07-15 04:58:42

●A104.21.25.482026-06-11 → 2026-07-15 · 3 obs

○ 2017-01-04 22:20:40
● 2026-06-11 10:58:26
● 2026-07-15 04:58:42

●A172.67.222.1792026-06-11 → 2026-07-15 · 3 obs

○ 2017-01-04 22:20:40
● 2026-06-11 10:58:26
● 2026-07-15 04:58:42

○A212.123.6.2542015-07-22 → 2016-01-15 · 4 obs

● 2015-07-22 15:42:52
● 2016-01-15 06:28:14
○ 2016-06-12 09:52:44
○ 2026-07-15 04:58:42

○A217.19.237.542016-06-12 → 2017-01-04 · 5 obs

○ 2016-01-15 06:28:14
● 2016-06-12 09:52:44
● 2017-01-04 22:20:40
○ 2026-06-11 10:58:26
○ 2026-07-15 04:58:42

●A2606:4700:3033::ac43:deb32026-07-11 → 2026-07-15 · 3 obs

○ 2026-06-11 10:58:26
● 2026-07-11 17:23:38
● 2026-07-15 04:58:42

●A2606:4700:3037::6815:19302026-06-11 → 2026-07-15 · 3 obs

○ 2017-01-04 22:20:40
● 2026-06-11 10:58:26
● 2026-07-15 04:58:42

○A2606:4700:3037::ac43:deb32026-06-11 → 2026-06-11 · 4 obs

○ 2017-01-04 22:20:40
● 2026-06-11 10:58:26
○ 2026-07-11 17:23:38
○ 2026-07-15 04:58:42

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
nl	ns1.dns.nl, ns3.dns.nl, ns4.dns.nl	-
concentra.nl	lila.ns.cloudflare.com, alexis.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.192.186

NS records: lila.ns.cloudflare.com, alexis.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for concentra.nl (unsigned zone)

⏱️ Timing

Total: 516ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.25.48, 172.67.222.179`
AAAA	2	`2606:4700:3037::6815:1930, 2606:4700:3033::ac43:deb3`
NS	2	`alexis.ns.cloudflare.com, lila.ns.cloudflare.com`
MX	1	`concentra-nl.mail.protection.outlook.com`
TXT	4	`IX6siCUP2sZmvkWrm+7d+0bbGEzXdSE4SRJp0UsH, MS=ms53512372...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`alexis.ns.cloudflare.com dns.cloudflare.`

Analysis

IP Addresses

concentra.nl resolves to four IP addresses: 104.21.25.48, 172.67.222.179, 2606:4700:3033::ac43:deb3 and 2606:4700:3037::6815:1930.

Additional host names — borrelli.name, nationalekidskrant.nl, veriqaluntra.com and two others — share IP numbers with concentra.nl.

Name Servers

DNS delegation for concentra.nl points to two name servers: alexis.ns.cloudflare.com and lila.ns.cloudflare.com.

concentra.nl shares its name server setup with other domains, including metrobaan.nl, weer.com, maastrichtbaan.nl and two others.

concentra.nl shares at least some of its name servers with other domains, including erkialas.com, klukan0madic.ink, expressprint.com and two others.

Host names with 6 IP numbers:

alexis.ns.cloudflare.com has IP addresses 108.162.193.60, 172.64.33.60 and 173.245.59.60, plus 3 other.

lila.ns.cloudflare.com has IP addresses 108.162.192.186, 172.64.32.186 and 173.245.58.186, plus 3 other.

Mail Servers

concentra.nl has one mail server: concentra-nl.mail.protection.outlook.com.

concentra-nl.mail.protection.outlook.com points to 8 IP numbers: 52.101.68.18, 52.101.68.32, 52.101.73.12 and 5 other.

concentra.nl - robtex.com

concentra.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

`concentra.nl`

`nl`