experteach.dk

📜 Historical scan 2026-09-23 13:36:50 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

experteach.dk is a .dk domain served by 3 nameservers (ns.udag.de, ns.udag.net, ns.udag.org). It was registered on 14 September 2006 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 89.31.143.90 is hosted by united-domains GmbH (AS202108) in Germany. Mail is handled by mx00.udag.de, mx01.udag.de. The zone is not DNSSEC-signed, has no DMARC policy and has no IPv6 address. 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#

3 records 40ms

Nameserver	IP addresses	PTR	ASN / ISP
ns.udag.de	2001:8d8:fe:53:217:160:80:253 217.160.80.253	ns.udag.de ns.udag.de	AS8560 IONOS SE AS8560 IONOS SE
ns.udag.net	185.132.33.253 2607:f1c0:fe:53:185:132:33:253	ns.udag.net ns.udag.net	AS15418 Fasthosts Internet Limited AS15418 Fasthosts Internet Limited
ns.udag.org	185.132.34.253 2607:f1c0:fe:53:185:132:34:253	ns.udag.org ns.udag.org	AS15418 Fasthosts Internet Limited AS15418 Fasthosts Internet Limited

🌍 A Records#

1 records 52ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
89.31.143.90	316s	—	AS202108	united-domains GmbH	89.31.142.0/23	🇩🇪 Germany	—

📧 MX Records#

2 records 70ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	14400s	mx00.udag.de	62.146.106.39	mx00.udag.de	AS15598 NorthC Deutschland GmbH
20	14400s	mx01.udag.de	62.146.106.40	mx01.udag.de	AS15598 NorthC Deutschland GmbH

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	89.31.143.90
🔶 Autoconfig	89.31.143.90

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 302ms

TXT Record
v=spf1 include:_smtp.udag.de ~all

✉️ SPF#

Policy	Record (experteach.dk)
~all (soft fail)	v=spf1 include:_smtp.udag.de ~all

📨 DMARC#

✗ No DMARC record — mail spoofing not restricted

📬 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 2026-10-23 03:14:09

www	89.31.143.90 (AS202108) (address records, no CNAME)
www vs bare domain	Same network experteach.dk: 89.31.143.90 (AS202108) www.experteach.dk: 89.31.143.90 (AS202108)
Wildcard	Yes: any name under the zone resolves

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

9080ms

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	2023112701
Primary NS (MNAME)	ns.udag.de
Responsible (RNAME)	hostmaster@united-domains.de
Refresh	10800s
Retry	3600s
Expire	604800s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-11 18:03:01

Field	Value
Registrar	united-domains GmbH
Registered	2006-09-14
Expires	2027-09-30 (339d)

🔗 Same registrant#

0 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).

No other domain with this registrant in our WHOIS data yet

📋 WHOIS#

⏱️ Lookup Timing#

40ms

52ms

70ms

AAAA

45ms

TXT

302ms

CAA

40ms

HTTPS

52ms

TLSA

79ms

SOA

0ms

MTA-STS

69ms

DNSSEC

9080ms

SRV

96ms

Total

9474ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-23 03:14:09	765ms	3 NS 1 A 2 MX	🔓 Insecure
2026-09-23 13:36:50 shown	9474ms	3 NS 1 A 2 MX	🔓 Insecure
2026-08-27 19:26:45	9544ms	3 NS 1 A 2 MX	🔓 Insecure
2026-06-26 10:34:21	822ms	3 NS 1 A 2 MX	🔓 Insecure
2026-06-21 00:29:17	553ms	3 NS 1 A 2 MX	🔓 Insecure
2026-06-17 09:09:13	1392ms	3 NS 1 A 2 MX	🔓 Insecure