teoriundervisning.dk

📜 Historical scan 2026-06-18 08:06:47 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

teoriundervisning.dk is a .dk domain served by 4 nameservers (ns1.nhl-data.dk, ns2.nhl-data.dk, ns3.nhl-data.dk and 1 more). It was registered on 19 July 2002 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 76.76.21.21 is hosted by Amazon.com, Inc. (AS16509) in United States. Mail is handled by mail.nhl-data.dk. The zone is not DNSSEC-signed, publishes a 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#

4 records 34ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.nhl-data.dk	185.136.96.11 2a06:fb00:1::1:11	ns1.nhl-data.dk ns1.nhl-data.dk	AS203391 Cloud DNS Ltd AS203391 Cloud DNS Ltd
ns2.nhl-data.dk	185.136.97.11 2a06:fb00:1::2:11	ns2.nhl-data.dk ns2.nhl-data.dk	AS203391 Cloud DNS Ltd AS203391 Cloud DNS Ltd
ns3.nhl-data.dk	185.136.98.11 2a06:fb00:1::3:11	ns3.nhl-data.dk ns3.nhl-data.dk	AS203391 Cloud DNS Ltd AS203391 Cloud DNS Ltd
ns4.nhl-data.dk	185.136.99.11 2a06:fb00:1::4:11	ns4.nhl-data.dk ns4.nhl-data.dk	AS203391 Cloud DNS Ltd AS203391 Cloud DNS Ltd

🌍 A Records#

1 records 36ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
76.76.21.21	—	—	AS16509	Amazon.com, Inc.	76.76.21.0/24	🇺🇸 United States	Walnut

📧 MX Records#

1 records 36ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	—	mail.nhl-data.dk	87.116.7.13	mail.nhl-data.dk	AS31027 GlobalConnect A/S

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	76.76.21.21
🔶 Autoconfig	76.76.21.21

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

4 records 240ms

TXT Record
12lf2rz0ywrwhfym1jzlq3mbyvzkf7sr
google-site-verification=1apr0lCgx79yXnlkkb0Gj8P-U8T285JuxId2MMCyZQM
google-site-verification=p9_Se2CCg2BCfIIp2x9J1vxZkO5JiDv_teLFjAg6plk
v=spf1 include:spf.mandrillapp.com include:spf.nhl-data.dk ip4:159.135.136.4 ip4:159.135.137.168 ip4:159.135.137.175 ip4:159.135.138.235 ip4:159.135.138.236 ip4:159.135.138.237 ip4:159.135.138.238 ip4:159.135.138.239 ip4:159.135.141.254 ip4:159.135.141.255 -all

✉️ SPF#

Policy	Record (teoriundervisning.dk)
-all (hard fail)	v=spf1 include:spf.mandrillapp.com include:spf.nhl-data.dk ip4:159.135.136.4 ip4:159.135.137.168 ip4:159.135.137.175 ip4:159.135.138.235 ip4:159.135.138.236 ip4:159.135.138.237 ip4:159.135.138.238 ip4:159.135.138.239 ip4:159.135.141.254 ip4:159.135.141.255 -all

📨 DMARC#

Policy	Record (_dmarc.teoriundervisning.dk)
p=none (monitor only)	v=DMARC1; p=none;

📬 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 2026-10-22 23:15:22

www	76.76.21.21 (AS16509) (address records, no CNAME)
www vs bare domain	Same network teoriundervisning.dk: 76.76.21.21 (AS16509) www.teoriundervisning.dk: 76.76.21.21 (AS16509)
Wildcard	Yes: any name under the zone resolves

🔎 SPF check#

zone-wide SPF report

DNS lookups: 2/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

113ms

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

🏷️ SOA#

38ms

Field	Value
Serial	2026061018
Primary NS (MNAME)	ns1.nhl-data.dk
Responsible (RNAME)	hostmaster@nhl-data.dk
Refresh	10800s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-24 02:07:08

Field	Value
Registrar	NHL DATA ApS
Registered	2002-07-19
Expires	2027-09-30 (341d)

🔗 Same registrant#

9 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
bedsteteoriprøver.dk	Punktum dk A/S (direct)
dennyeteoriprøve.dk	NHL DATA ApS
klarteori.dk	NHL DATA ApS
køreteoriprøve.dk	Punktum dk A/S (direct)
teoriklare.dk	NHL DATA ApS
teoriklaret.dk	NHL DATA ApS
teoriproven.dk	Punktum dk A/S (direct)
teoritestonline.dk	NHL DATA ApS
undervisningssystem.dk	NHL DATA ApS

📋 WHOIS#

⏱️ Lookup Timing#

34ms

36ms

AAAA

37ms

TXT

240ms

CAA

39ms

HTTPS

42ms

TLSA

115ms

SOA

38ms

MTA-STS

166ms

DNSSEC

113ms

SRV

85ms

Total

714ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-22 23:15:22	2943ms	4 NS 1 A 1 MX	🔓 Insecure
2026-10-01 02:06:34	1890ms	4 NS 1 A 1 MX	🔓 Insecure
2026-08-24 12:41:40	3448ms	4 NS 1 A 1 MX	🔓 Insecure
2026-06-24 19:24:54	2273ms	4 NS 1 A 1 MX	🔓 Insecure
2026-06-20 15:53:37	362ms	4 NS 1 A 1 MX	🔓 Insecure
2026-06-20 13:34:54	578ms	4 NS 1 A 1 MX	🔓 Insecure
2026-06-18 08:06:47 shown	714ms	4 NS 1 A 1 MX	🔓 Insecure