flexnu.dk - dns.ninja

`flexnu.dk`

DNSSEC	⚠️ Not signed
A	76.76.21.21^{🇺🇸 Amazon76.76.21.0/24 EC2 Prefix}
NS	`byron.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2c43^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`byron.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c343^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`byron.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2343^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`byron.ns.cloudflare.com`
		A	108.162.195.67^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`byron.ns.cloudflare.com`
		A	162.159.44.67^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`byron.ns.cloudflare.com`
		A	172.64.35.67^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`byron.ns.cloudflare.com`
NS	`ursula.ns.cloudflare.com`
		A	2606:4700:50::a29f:26bf^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ursula.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c2bf^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`ursula.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:22bf^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`ursula.ns.cloudflare.com`
		A	108.162.194.191^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ursula.ns.cloudflare.com`
		A	162.159.38.191^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ursula.ns.cloudflare.com`
		A	172.64.34.191^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ursula.ns.cloudflare.com`
MX	`flexnu-dk.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::b^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-dbbpr03cu00103.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::3^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am6pr04cu00303.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::7^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am9pr04cu00107.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::20^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-as8pr05cu00400.inbound.protection.outlook.com`
		A	52.101.68.3^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db7pr03cu00403.inbound.protection.outlook.com`
		A	52.101.68.18^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db4pr02cu00302.inbound.protection.outlook.com`
		A	52.101.73.16^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as2pr05cu00100.inbound.protection.outlook.com`
		A	52.101.73.153^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as8pr05cu00401.inbound.protection.outlook.com`
TXT	`MS=ms43221920`
TXT	`v=spf1 include:spf.protection.outlook.com include:amazonses.com include:send....`
SOA	`byron.ns.cloudflare.com`dns@cloudflare.com serial=2405010191

`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 1781356141localtime Sat Jun 13 15:09:01 2026gmtime Sat Ju...`
	SOA	`b.nic.dk`tech@punktum.dk serial=1781356141

🔒 HSTS Preload (+subdomains)

Same first word

flexnu.com

flexnu.dk

Similar names

nuflex.com

enflux.ro

luxfen.de

luxfen.com

nuflex.nl

fenlux.com

nuflex.de

fluxen.de

fluxen.com.mx

lefunx.com

luxfen.lu

lexfun.org

unflex.com

fluenx.com

lexfun.com

flunex.com

enflux.de

nuflex.co.za

enflux.org

xenful.com

fenlux.lu

nuflex.ca

enflux.com

fenlux.ch

flexun.com

neflux.com

funlex.com

fenlux.de

fluxen.com

nexful.com

DNS History

4 records (4 active, 0 former)

●NSbyron.ns.cloudflare.com2026-06-05 → 2026-06-13 · 2 obs

● 2026-06-05 07:57:38
● 2026-06-13 13:37:34

●NSursula.ns.cloudflare.com2026-06-05 → 2026-06-13 · 2 obs

● 2026-06-05 07:57:38
● 2026-06-13 13:37:34

●MXflexnu-dk.mail.protection.outlook.com2026-06-05 → 2026-06-13 · 2 obs

● 2026-06-05 07:57:38
● 2026-06-13 13:37:34

●A76.76.21.212026-06-05 → 2026-06-13 · 2 obs

● 2026-06-05 07:57:38
● 2026-06-13 13:37:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dk	b.nic.dk, c.nic.dk, h.nic.dk, l.nic.dk...	-
flexnu.dk	ursula.ns.cloudflare.com, byron.ns.cloudflare.com	-

✅ Authoritative Response

Server:162.159.44.67

NS records: ursula.ns.cloudflare.com, byron.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for flexnu.dk (unsigned zone)

⏱️ Timing

Total: 1074ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`76.76.21.21`
NS	2	`byron.ns.cloudflare.com, ursula.ns.cloudflare.com`
MX	1	`flexnu-dk.mail.protection.outlook.com (p`
TXT	2	`MS=ms43221920, v=spf1 include:spf.protection.outlook.co`
SOA	1	`byron.ns.cloudflare.com dns.cloudflare.c`

Analysis

IP Addresses

flexnu.dk has exactly one IP address — 76.76.21.21.

o-s-h-a.com, butler-medien.com, claudepromax.pro plus two other host names have IP numbers in common with flexnu.dk.

Name Servers

flexnu.dk uses two name servers for its delegation: byron.ns.cloudflare.com and ursula.ns.cloudflare.com.

The name server configuration of flexnu.dk is shared with other domains, for instance thomasnmartin.com, jonzkie.com, alterego.od.ua and two others.

flexnu.dk shares at least some of its name servers with other domains, including dw-kuailian.com.cn, zearesort.com, thinkpharmacy.com.au and two others.

These name servers are frequently paired with the name servers amy.ns.cloudflare.com and randy.ns.cloudflare.com.

Hosts with 6 IP addresses each:

Hostname byron.ns.cloudflare.com directs to 108.162.195.67, 162.159.44.67 and 172.64.35.67 along with 3 other IP addresses.

Hostname ursula.ns.cloudflare.com directs to 108.162.194.191, 162.159.38.191 and 172.64.34.191 along with 3 other IP addresses.

Mail Servers

flexnu.dk uses one mail server — flexnu-dk.mail.protection.outlook.com.

flexnu-dk.mail.protection.outlook.com has 8 IP addresses: 52.101.68.3, 52.101.68.18, 52.101.73.16 plus 5 more.