undervisernet.dk

Records from scan: 2026-09-30 00:23:18 · 935ms total · last checked 2026-10-20 00:15 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

undervisernet.dk is a .dk domain served by 2 nameservers (ns.dandomain.dk, ns2.dandomain.dk). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 65.21.4.12 is hosted by Hetzner Online GmbH (AS24940) in Finland. Mail is handled by mxa.eu.mailgun.org, mxb.eu.mailgun.org. The zone is DNSSEC-signed and validates, publishes a DMARC policy and has no IPv6 address. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 61ms

Nameserver	IP addresses	PTR	ASN / ISP
ns.dandomain.dk	185.25.141.3 2a02:2339:4006:109::dd	ns.dandomain.dk ns.dandomain.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.dandomain.dk	2a02:2339:1:108::dd:dd 91.197.248.66	ns2.dandomain.dk ns2.dandomain.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 25ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
65.21.4.12	360s	static.12.4.21.65.clients.your-server.de	AS24940	Hetzner Online GmbH	65.21.0.0/16	🇫🇮 Finland	Helsinki

📧 MX Records#

2 records 32ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	mxa.eu.mailgun.org	34.111.130.244	244.130.111.34.bc.googleusercontent.com	AS396982 Google LLC
10	3600s	mxb.eu.mailgun.org	34.111.130.244	244.130.111.34.bc.googleusercontent.com	AS396982 Google LLC

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	frontend.undervisernet.dk → 65.21.4.12
🔶 Autoconfig	frontend.undervisernet.dk → 65.21.4.12

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 138ms

TXT Record
v=spf1 include:mailgun.org ~all

✉️ SPF#

Policy	Record (undervisernet.dk)
~all (soft fail)	v=spf1 include:mailgun.org ~all

📨 DMARC#

Policy	Record (_dmarc.undervisernet.dk)
p=none (monitor only)	v=DMARC1; p=none; pct=100; fo=1; ri=3600; rua=mailto:f0bd0ffe@dmarc.mailgun.org,mailto:d2c6ced7@inbox.ondmarc.com; ruf=mailto:f0bd0ffe@dmarc.mailgun.org,mailto:d2c6ced7@inbox.ondmarc.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#

checked 2026-10-08 03:04:08

www CNAME	teacherappb2clive.azurewebsites.net (all on azurewebsites.net) → 20.50.64.4 (AS8075)
www vs bare domain	Different networks undervisernet.dk: 65.21.4.12 (AS24940) www.undervisernet.dk: 20.50.64.4 (AS8075) (all like this)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 5/10 · policy: ~all

No problems found

🔏 ACME Challenge#

Type	Name	Value
CNAME	_acme-challenge.undervisernet.dk	frontend.undervisernet.dk

🔗 TLSA / DANE#

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

🔐 DNSSEC#

105ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA#

0ms

Field	Value
Serial	2025112601
Primary NS (MNAME)	ns.dandomain.dk
Responsible (RNAME)	hostmaster@dandomain.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

61ms

25ms

32ms

AAAA

43ms

TXT

138ms

CAA

81ms

HTTPS

55ms

TLSA

113ms

SOA

0ms

MTA-STS

75ms

DNSSEC

105ms

SRV

397ms

Total

935ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-30 00:23:18 shown	935ms	2 NS 1 A 2 MX	🔒 Secure
2026-09-11 08:28:43	756ms	2 NS 1 A 2 MX	🔒 Secure
2026-06-22 20:50:18	847ms	2 NS 1 A 2 MX	🔒 Secure
2026-06-18 05:26:49	3153ms	2 NS 1 A 2 MX	🔒 Secure