undervisningstavler.dk DNS records

🖥️ Nameservers2 records 39ms

Nameserver	IP addresses	PTR	ASN / ISP
cortney.ns.cloudflare.com	108.162.192.87 172.64.32.87 173.245.58.87 2606:4700:50::adf5:3a57 2803:f800:50::6ca2:c057 2a06:98c1:50::ac40:2057	cortney.ns.cloudflare.com cortney.ns.cloudflare.com cortney.ns.cloudflare.com cortney.ns.cloudflare.com cortney.ns.cloudflare.com cortney.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
eric.ns.cloudflare.com	108.162.193.112 172.64.33.112 173.245.59.112 2606:4700:58::adf5:3b70 2803:f800:50::6ca2:c170 2a06:98c1:50::ac40:2170	eric.ns.cloudflare.com eric.ns.cloudflare.com eric.ns.cloudflare.com eric.ns.cloudflare.com eric.ns.cloudflare.com eric.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records2 records 51ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.19.244	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.190.130	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records1 records 56ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	mail.undervisningstavler.dk	194.150.112.200	mailproxy1.dandomain.dk	AS48854 team.blue Denmark A/S

🔷 AAAA Records (IPv6)2 records 52ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3031::6815:13f4	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3033::ac43:be82	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records1 records 43ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.19.244,172.67.190.130 ech=AEX+DQBBAgAgACBSqxHEWwlg5gVXZ+XFMuidaz9srYjrwzF2iMlO/jXGGAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:13f4,2606:4700:3033::ac43:be82

📝 TXT Records

📝

No TXT records found

✉️ 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

🔏 ACME Challenge

Type	Name	Value
TXT	_acme-challenge.undervisningstavler.dk	bXIrnoUFNokmlsvW0qS_KPmUcnTFsplPeL2cY8cDZt4
TXT	_acme-challenge.undervisningstavler.dk	h07wT2GxgdyLIKGizE6U9FiL654LC6wKpLzf-S6VihA

🔗 TLSA / DANE

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

🔐 DNSSEC95ms

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

🏷️ SOA0ms

Field	Value
Serial	2413253638
Primary NS (MNAME)	cortney.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

39ms

A

51ms

MX

56ms

AAAA

52ms

TXT

220ms

CAA

40ms

HTTPS

43ms

TLSA

84ms

SOA

0ms

MTA-STS

85ms

DNSSEC

95ms

SRV

74ms

Total

666ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-09-01 11:19:21	666ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-09-01 08:53:49	601ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-08-27 05:53:25	757ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-08-20 04:45:23	11421ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-08-17 23:33:59	4294ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-08-15 15:38:43	2168ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-31 23:10:01	963ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-01 11:12:46	1074ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-19 22:35:03	728ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-17 12:02:41	1153ms	2 NS 2 A 1 MX	❓ Unknown	View