studieboeger.dk DNS records

🖥️ Nameservers2 records 26ms

Nameserver	IP addresses	PTR	ASN / ISP
fish.ns.cloudflare.com	108.162.194.252 162.159.38.252 172.64.34.252 2606:4700:50::a29f:26fc 2803:f800:50::6ca2:c2fc 2a06:98c1:50::ac40:22fc	fish.ns.cloudflare.com fish.ns.cloudflare.com fish.ns.cloudflare.com fish.ns.cloudflare.com fish.ns.cloudflare.com fish.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
pranab.ns.cloudflare.com	108.162.195.199 162.159.44.199 172.64.35.199 2606:4700:58::a29f:2cc7 2803:f800:50::6ca2:c3c7 2a06:98c1:50::ac40:23c7	pranab.ns.cloudflare.com pranab.ns.cloudflare.com pranab.ns.cloudflare.com pranab.ns.cloudflare.com pranab.ns.cloudflare.com pranab.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records2 records 30ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.15.245	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.165.85	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records1 records 38ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	mail.mahoje.dk	89.167.70.15	mail.mahoje.dk	AS24940 Hetzner Online GmbH

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	mail.mahoje.dk → 89.167.70.15
🔶 Autoconfig	mail.mahoje.dk → 89.167.70.15

🔷 AAAA Records (IPv6)2 records 31ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3031::6815:ff5	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3035::ac43:a555	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records1 records 35ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.15.245,172.67.165.85 ech=AEX+DQBBRAAgACCnLwJmLitMBK1QAaEjyUWooIefQjI8u06YMkWVcYiNQAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:ff5,2606:4700:3035::ac43:a555

🔌 SRV Records1 records 69ms

Service	Priority	Weight	Port	Target
_imaps._tcp	0	1	993	mail.mahoje.dk

📝 TXT Records1 records 155ms

TXT Record
v=spf1 mx -all

✉️ SPF

Policy	Record (studieboeger.dk)
-all (hard fail)	v=spf1 mx -all

📨 DMARC

Policy	Record (_dmarc.studieboeger.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:postmaster@studieboeger.dk

📬 MTA-STS172ms

Check	Result
Status	🧪 Testing
TXT record (_mta-sts)	✓ Found
HTTPS policy	✓ Valid
Mode	testing
Policy ID	9698806436038367355
max_age	604800s
Policy MX	mail.mahoje.dk

📈 TLSRPT

Status	Report address (rua)
✓ Enabled	mailto:postmaster@studieboeger.dk

📜 CAA Records

✗ No CAA records — any CA may issue certificates

🔏 ACME Challenge

Type	Name	Value
TXT	_acme-challenge.studieboeger.dk	JBqB9TeUmuWWus-W37pTGFOynHj9eFsx3nvg3nI4AL4

🔗 TLSA / DANE

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

🔐 DNSSEC101ms

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	2413475055
Primary NS (MNAME)	fish.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

26ms

A

30ms

MX

38ms

AAAA

31ms

TXT

155ms

CAA

25ms

HTTPS

35ms

TLSA

50ms

SOA

0ms

MTA-STS

172ms

DNSSEC

101ms

SRV

69ms

Total

627ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-29 18:27:15	627ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-08-28 15:29:36	1636ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-08-23 01:26:15	1232ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-08-06 13:29:27	1254ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-22 07:31:32	17724ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-26 21:53:52	1082ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-21 17:54:42	880ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-18 05:39:40	788ms	2 NS 2 A 1 MX	🔓 Insecure	View