skolefessor.dk

📜 Historical scan 2026-07-11 09:03:47 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

skolefessor.dk is a .dk domain served by 2 nameservers (cloe.ns.cloudflare.com, terin.ns.cloudflare.com). It was registered on 31 December 2024 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.9.122 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mail.skolefessor.dk. 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 32ms

Nameserver	IP addresses	PTR	ASN / ISP
cloe.ns.cloudflare.com	108.162.192.86 172.64.32.86 173.245.58.86 2606:4700:50::adf5:3a56 2803:f800:50::6ca2:c056 2a06:98c1:50::ac40:2056	cloe.ns.cloudflare.com cloe.ns.cloudflare.com cloe.ns.cloudflare.com cloe.ns.cloudflare.com cloe.ns.cloudflare.com cloe.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
terin.ns.cloudflare.com	108.162.193.236 172.64.33.236 173.245.59.236 2606:4700:58::adf5:3bec 2803:f800:50::6ca2:c1ec 2a06:98c1:50::ac40:21ec	terin.ns.cloudflare.com terin.ns.cloudflare.com terin.ns.cloudflare.com terin.ns.cloudflare.com terin.ns.cloudflare.com terin.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 32ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.9.122	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.189.65	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 33ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	mail.skolefessor.dk	—	—	—

🔷 AAAA Records (IPv6)#

2 records 30ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3035::ac43:bd41	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3036::6815:97a	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 31ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.9.122,172.67.189.65 ech=AEX+DQBBmwAgACCvvTDHg/wYPVugFmgGRTKG/Z/2UrrZekvx9xZHJMOiEwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3035::ac43:bd41,2606:4700:3036::6815:97a

📝 TXT Records#

1 records 170ms

TXT Record
v=spf1 a mx include:_spf.google.com ~all

✉️ SPF#

Policy	Record (skolefessor.dk)
~all (soft fail)	v=spf1 a mx include:_spf.google.com ~all

📨 DMARC#

Policy	Record (_dmarc.skolefessor.dk)
p=none (monitor only)	v=DMARC1; p=none; rua=mailto:dmarc@zebiza.com

📬 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 2026-10-04 08:30:25

www	Address record (no CNAME)
Wildcard	No

✍️ DKIM keys#

1 found

Selector	CNAME	Key
default	—	Revoked (empty key)

DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 3/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

55ms

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	2409199814
Primary NS (MNAME)	cloe.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-09 23:32:01

Field	Value
Registrar	Simply.com A/S
Registered	2024-12-31
Expires	2027-12-30 (433d)

📋 WHOIS#

⏱️ Lookup Timing#

32ms

33ms

AAAA

30ms

TXT

170ms

CAA

30ms

HTTPS

31ms

TLSA

69ms

SOA

0ms

MTA-STS

46ms

DNSSEC

55ms

SRV

56ms

Total

927ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-04 08:30:25	486ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-30 03:03:44	529ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-26 04:03:58	647ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-25 03:38:23	610ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-12 08:48:56	2459ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-26 17:27:49	699ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-27 11:21:27	4706ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-20 09:30:25	8923ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-11 09:03:47 shown	927ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-17 17:10:36	1700ms	2 NS 2 A 1 MX	🔓 Insecure