classroom.dk

📜 Historical scan 2026-06-20 17:12:07 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

classroom.dk is a .dk domain served by 2 nameservers (ns1.parkingcrew.net, ns2.parkingcrew.net). It was registered on 20 June 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.247.81.99 is hosted by Team Internet AG (AS206834) in Canada. Mail is handled by mail.h-email.net. 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#

2 records 196ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.parkingcrew.net	13.248.158.159	a94f3aae71d6f0705.awsglobalaccelerator.com	AS16509 Amazon.com, Inc.
ns2.parkingcrew.net	76.223.21.9	a94f3aae71d6f0705.awsglobalaccelerator.com	AS16509 Amazon.com, Inc.

🌍 A Records#

1 records 196ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.247.81.99	3600s	—	AS206834	Team Internet AG	104.247.80.0/22	🇨🇦 Canada	—

📧 MX Records#

1 records 208ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
5	3600s	mail.h-email.net	162.55.164.116 165.227.156.49 165.227.159.144 167.235.143.33 178.62.199.248 49.13.4.90 5.161.194.135 5.161.98.212 5.75.171.74 91.107.214.206	static.116.164.55.162.clients.your-server.de mail3.h-email.net mail2.h-email.net mail.h-email.net mail.h-email.net static.90.4.13.49.clients.your-server.de static.135.194.161.5.clients.your-server.de mail.h-email.net mail.h-email.net static.206.214.107.91.clients.your-server.de	AS24940 Hetzner Online GmbH AS14061 DigitalOcean, LLC AS14061 DigitalOcean, LLC AS24940 Hetzner Online GmbH AS14061 DigitalOcean, LLC AS24940 Hetzner Online GmbH AS213230 Hetzner Online GmbH AS213230 Hetzner Online GmbH AS24940 Hetzner Online GmbH AS24940 Hetzner Online GmbH

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	104.247.81.99
🔶 Autoconfig	104.247.81.99

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 1068ms

TXT Record
v=spf1 ip6:fd1b:212c:a5f9::/48 -all

✉️ SPF#

Policy	Record (classroom.dk)
-all (hard fail)	v=spf1 ip6:fd1b:212c:a5f9::/48 -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#

1 records 211ms

Flags	Tag	Value
0	issue	letsencrypt.org

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-08 21:31:44

www	104.247.81.99 (AS206834) (address records, no CNAME)
www vs bare domain	Same network classroom.dk: 104.247.81.99 (AS206834) www.classroom.dk: 104.247.81.99 (AS206834)
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#

332ms

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

🏷️ SOA#

204ms

Field	Value
Serial	1781004750
Primary NS (MNAME)	ns1.parkingcrew.net
Responsible (RNAME)	hostmaster@classroom.dk
Refresh	28800s
Retry	7200s
Expire	604800s
Minimum (neg-cache TTL)	86400s

📋 Registration#

WHOIS fetched 2026-10-13 19:00:43

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2017-06-20
Expires	2027-06-30 (254d)

🔗 Same registrant#

3 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
gribby.dk	Punktum dk A/S (direct)
hi.dk	Punktum dk A/S (direct)
teori.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

196ms

208ms

AAAA

201ms

TXT

1068ms

CAA

211ms

HTTPS

218ms

TLSA

124ms

SOA

204ms

MTA-STS

125ms

DNSSEC

332ms

SRV

314ms

Total

1930ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-29 16:18:53	1474ms	2 NS 1 A 0 MX	🔓 Insecure
2026-08-28 16:47:16	1589ms	2 NS 1 A 0 MX	🔓 Insecure
2026-08-26 15:44:29	1627ms	2 NS 1 A 0 MX	🔓 Insecure
2026-08-24 17:51:50	1601ms	2 NS 1 A 0 MX	🔓 Insecure
2026-08-17 19:56:25	10395ms	2 NS 1 A 0 MX	🔓 Insecure
2026-08-06 04:31:59	2048ms	2 NS 1 A 0 MX	🔓 Insecure
2026-08-03 15:40:28	977ms	2 NS 1 A 0 MX	🔓 Insecure
2026-06-23 06:33:50	3731ms	2 NS 1 A 0 MX	🔓 Insecure
2026-06-20 17:12:07 shown	1930ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-16 21:05:25	2476ms	2 NS 1 A 0 MX	🔓 Insecure