f5udvikling.dk

📜 Historical scan 2026-09-27 12:28:27 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

f5udvikling.dk is a .dk domain served by 2 nameservers (lady.ns.cloudflare.com, yahir.ns.cloudflare.com). It was registered on 1 September 2026 (WHOIS) and first appeared in the .dk zone on 2 September 2026. Its website address 104.21.31.253 is hosted by Cloudflare, Inc. (AS13335). The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 43ms

Nameserver	IP addresses	PTR	ASN / ISP
lady.ns.cloudflare.com	108.162.192.127 172.64.32.127 173.245.58.127 2606:4700:50::adf5:3a7f 2803:f800:50::6ca2:c07f 2a06:98c1:50::ac40:207f	lady.ns.cloudflare.com lady.ns.cloudflare.com lady.ns.cloudflare.com lady.ns.cloudflare.com lady.ns.cloudflare.com lady.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
yahir.ns.cloudflare.com	108.162.195.34 162.159.44.34 172.64.35.34 2606:4700:58::a29f:2c22 2803:f800:50::6ca2:c322 2a06:98c1:50::ac40:2322	yahir.ns.cloudflare.com yahir.ns.cloudflare.com yahir.ns.cloudflare.com yahir.ns.cloudflare.com yahir.ns.cloudflare.com yahir.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

2 records 41ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.31.253	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.181.225	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

📧

No MX records found

🔷 AAAA Records (IPv6)#

2 records 62ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3033::ac43:b5e1	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3036::6815:1ffd	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 43ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.31.253,172.67.181.225 ech=AEX+DQBBXAAgACCIWLKD+LOCw2vk7p/2eDGPueQHn9zjeagtoOaQlW3JCAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::ac43:b5e1,2606:4700:3036::6815:1ffd

📝 TXT Records#

📝

No TXT records found

✉️ SPF#

✗ No SPF record — mail spoofing not restricted

📨 DMARC#

Policy	Record (_dmarc.f5udvikling.dk)
p=reject	v=DMARC1; p=reject; sp=reject; rua=mailto:rua+01xq8ugxd4iz@dmarcwise.email;

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

✗ No CAA records — any CA may issue certificates

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-09 04:03:57

www	104.21.31.253 172.67.181.225 2606:4700:3033::ac43:b5e1 2606:4700:3036::6815:1ffd (AS13335) (address records, no CNAME)
www vs bare domain	Same network f5udvikling.dk: 104.21.31.253 172.67.181.225 2606:4700:3033::ac43:b5e1 2606:4700:3036::6815:1ffd (AS13335) www.f5udvikling.dk: 104.21.31.253 172.67.181.225 2606:4700:3033::ac43:b5e1 2606:4700:3036::6815:1ffd (AS13335)
Wildcard	No

🔗 TLSA / DANE#

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC#

9082ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA#

0ms

Field	Value
Serial	2415728796
Primary NS (MNAME)	lady.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-21 22:42:09

Field	Value
Registrar	CURANET A/S
Registered	2026-09-01
Expires	2027-08-31 (313d)

🔗 Same registrant#

13 domains

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

Domain	Registrar
businessinstitute-mbauddannelse.dk	CURANET A/S
businessinstitute-uddannelse.dk	CURANET A/S
businessinstitute-uddannelser.dk	CURANET A/S
ceresbyentappehaller.dk	CURANET A/S
f5-danmark.dk	CURANET A/S
f5-dev.dk	CURANET A/S
f5danmark.dk	CURANET A/S
f5leder.dk	CURANET A/S
f5ledernetvaerk.dk	CURANET A/S
f5netvaerket.dk	CURANET A/S
f5network.dk	CURANET A/S
f5nordic.dk	CURANET A/S
tuborgtappehaller.dk	CURANET A/S

📋 WHOIS#

⏱️ Lookup Timing#

43ms

41ms

44ms

AAAA

62ms

TXT

201ms

CAA

59ms

HTTPS

43ms

TLSA

47ms

SOA

0ms

MTA-STS

57ms

DNSSEC

9082ms

SRV

561ms

Total

9435ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-01 00:46:34	584ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-27 12:28:27 shown	9435ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-24 13:13:36	649ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-16 11:21:27	674ms	2 NS 0 A 0 MX	🔓 Insecure
2026-09-02 08:55:54	889ms	2 NS 0 A 0 MX	🔓 Insecure