theflippedclassroom.dk

📜 Historical scan 2026-09-30 11:35:30 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

theflippedclassroom.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 9 May 2012 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.20.243.206 is hosted by GlobalConnect A/S (AS31027) in Denmark. Mail is handled by .. The zone is DNSSEC-signed and validates, 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 53ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.one.com	195.206.121.10 2001:67c:28cc::10	ns01.one.com ns01.one.com	AS197495 One.com A/S AS197495 One.com A/S
ns02.one.com	185.10.11.10 2001:67c:3c0::10	ns02.one.com ns02.one.com	AS51468 One.com A/S AS51468 One.com A/S

🌍 A Records#

1 records 48ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.20.243.206	43200s	—	AS31027	GlobalConnect A/S	185.20.240.0/22	🇩🇰 Denmark	Sønder Felding

📧 MX Records#

1 records 44ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	. Null MX — domain accepts no email (RFC 7505)

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 166ms

TXT Record
uvmid=851203

✉️ SPF#

✗ No SPF record — mail spoofing not restricted

📨 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 2026-10-09 15:20:10

www	185.20.243.206 (AS31027) (address records, no CNAME)
www vs bare domain	Same network theflippedclassroom.dk: 185.20.243.206 (AS31027) www.theflippedclassroom.dk: 185.20.243.206 (AS31027)
Wildcard	No
Denial of existence	NSEC3 · 0 iterations · no salt RFC 9276 ✓
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

🔗 TLSA / DANE#

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

🔐 DNSSEC#

77ms

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

🏷️ SOA#

56ms

Field	Value
Serial	2026092901
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

WHOIS fetched 2026-10-04 12:30:50

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2012-05-09
Expires	2030-05-31 (1318d)

📋 WHOIS#

⏱️ Lookup Timing#

53ms

48ms

44ms

AAAA

47ms

TXT

166ms

CAA

59ms

HTTPS

35ms

TLSA

53ms

SOA

56ms

MTA-STS

60ms

DNSSEC

77ms

SRV

73ms

Total

466ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-04 11:43:00	351ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-30 11:35:30 shown	466ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-29 05:26:37	3074ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-04 10:13:05	3077ms	2 NS 1 A 4 MX	🔒 Secure
2026-08-27 10:44:15	818ms	2 NS 1 A 4 MX	🔒 Secure
2026-06-17 17:12:51	1260ms	2 NS 1 A 4 MX	🔒 Secure