a4uddannelse.dk

📜 Historical scan 2026-10-01 07:15:31 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

a4uddannelse.dk is a .dk domain served by 2 nameservers (dave.ns.cloudflare.com, marge.ns.cloudflare.com). It was registered on 31 May 2021 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.18.236 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 31ms

Nameserver	IP addresses	PTR	ASN / ISP
dave.ns.cloudflare.com	108.162.193.109 172.64.33.109 173.245.59.109 2606:4700:58::adf5:3b6d 2803:f800:50::6ca2:c16d 2a06:98c1:50::ac40:216d	dave.ns.cloudflare.com dave.ns.cloudflare.com dave.ns.cloudflare.com dave.ns.cloudflare.com dave.ns.cloudflare.com dave.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
marge.ns.cloudflare.com	108.162.192.191 172.64.32.191 173.245.58.191 2606:4700:50::adf5:3abf 2803:f800:50::6ca2:c0bf 2a06:98c1:50::ac40:20bf	marge.ns.cloudflare.com marge.ns.cloudflare.com marge.ns.cloudflare.com marge.ns.cloudflare.com marge.ns.cloudflare.com marge.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 35ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.18.236	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.183.229	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

📧

No MX records found

🔷 AAAA Records (IPv6)#

2 records 34ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3031::ac43:b7e5	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3034::6815:12ec	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 33ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.18.236,172.67.183.229 ech=AEX+DQBBuAAgACBEKqOBo9rNAQzwWqgZ0c4KpnrXyZqJ/Dv1lOqMnuCRQAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::ac43:b7e5,2606:4700:3034::6815:12ec

📝 TXT Records#

1 records 159ms

TXT Record
v=spf1 -all

✉️ SPF#

Policy	Record (a4uddannelse.dk)
-all (hard fail)	v=spf1 -all

📨 DMARC#

Policy	Record (_dmarc.a4uddannelse.dk)
p=reject	v=DMARC1; p=reject; sp=reject; adkim=s; aspf=s;

📬 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 2026-10-10 12:16:47

www	104.21.18.236 172.67.183.229 2606:4700:3031::ac43:b7e5 2606:4700:3034::6815:12ec (AS13335) (address records, no CNAME)
www vs bare domain	Same network a4uddannelse.dk: 104.21.18.236 172.67.183.229 2606:4700:3031::ac43:b7e5 2606:4700:3034::6815:12ec (AS13335) www.a4uddannelse.dk: 104.21.18.236 172.67.183.229 2606:4700:3031::ac43:b7e5 2606:4700:3034::6815:12ec (AS13335)
Wildcard	No

🔎 SPF check#

zone-wide SPF report

DNS lookups: 0/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

59ms

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

🏷️ SOA#

29ms

Field	Value
Serial	2415318719
Primary NS (MNAME)	dave.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-05 07:57:09

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2021-05-31
Expires	2027-05-31 (226d)

📋 WHOIS#

⏱️ Lookup Timing#

31ms

35ms

33ms

AAAA

34ms

TXT

159ms

CAA

47ms

HTTPS

33ms

TLSA

61ms

SOA

29ms

MTA-STS

58ms

DNSSEC

59ms

SRV

55ms

Total

444ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-05 07:38:26	588ms	2 NS 2 A 0 MX	🔓 Insecure
2026-10-01 07:15:31 shown	444ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-29 23:33:07	483ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-27 17:21:18	2424ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-23 22:49:14	609ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-26 15:05:06	521ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-07 06:36:33	2832ms	2 NS 2 A 0 MX	🔓 Insecure
2026-07-31 03:49:11	762ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-30 14:52:12	1132ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-24 09:44:18	5554ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-24 01:39:01	1040ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-20 14:13:43	1986ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-16 12:42:21	447ms	2 NS 2 A 0 MX	🔓 Insecure