studieboeger.dk

📜 Historical scan 2026-09-29 18:43:09  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

studieboeger.dk is a .dk domain served by 2 nameservers (fish.ns.cloudflare.com, pranab.ns.cloudflare.com). It was registered on 23 January 2024 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.15.245 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mail.mahoje.dk. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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   47ms
NameserverIP addressesPTRASN / 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 Records#

2 records   33ms
IPTTLPTRASNISP / OrgCIDRCountryCity
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 Records#

1 records   53ms
PriorityTTLMail ServerIP addressesPTRASN
10 300s mail.mahoje.dk 89.167.70.15 mail.mahoje.dk AS24940 Hetzner Online GmbH

📧 Autodiscover / Autoconfig#

ServiceCNAME / IP
🔷 Autodiscovermail.mahoje.dk → 89.167.70.15
🔶 Autoconfigmail.mahoje.dk → 89.167.70.15

🔷 AAAA Records (IPv6)#

2 records   45ms
IPv6 AddressTTLPTRASNISP / OrgCIDRCountryCity
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 Records#

1 records   46ms
PriorityTargetSvcParams
1 service . alpn="h3,h2" ipv4hint=104.21.15.245,172.67.165.85 ech=AEX+DQBBuwAgACDNTKBkGhaU2gTqSCDGhZmGJ9+/uVqwfBSGzNbtH0RTTgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:ff5,2606:4700:3035::ac43:a555

🔌 SRV Records#

1 records   83ms
ServicePriorityWeightPortTarget
_imaps._tcp 0 1 993 mail.mahoje.dk

📝 TXT Records#

1 records   244ms
TXT Record
v=spf1 mx -all

✉️ SPF#

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

📨 DMARC#

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

📬 MTA-STS#

314ms
CheckResult
Status🔒 Enforce
TXT record (_mta-sts)✓ Found
HTTPS policy✓ Valid
Modeenforce
Policy ID12492662234613369411
max_age604800s
Policy MXmail.mahoje.dk

📈 TLSRPT#

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

📜 CAA Records#

✗ No CAA records — any CA may issue certificates

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-12 05:34:51
www104.21.15.245 172.67.165.85 2606:4700:3031::6815:ff5 2606:4700:3035::ac43:a555 (AS13335) (address records, no CNAME)
www vs bare domainSame network
WildcardYes: any name under the zone resolves

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: -all

No problems found

🔏 ACME Challenge#

TypeNameValue
TXT _acme-challenge.studieboeger.dk JBqB9TeUmuWWus-W37pTGFOynHj9eFsx3nvg3nI4AL4

🔗 TLSA / DANE#

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

🔐 DNSSEC#

118ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer

🏷️ SOA#

28ms
FieldValue
Serial2416162300
Primary NS (MNAME)fish.ns.cloudflare.com
Responsible (RNAME)dns@cloudflare.com
Refresh10000s
Retry2400s
Expire604800s
Minimum (neg-cache TTL)1800s

📋 Registration#

WHOIS fetched 2026-10-04 16:35:50
FieldValue
RegistrarPunktum dk A/S (direct)
Registered2024-01-23
Expires2027-01-22 (91d)
📋 WHOIS#

⏱️ Lookup Timing#

NS
47ms
A
33ms
MX
53ms
AAAA
45ms
TXT
244ms
CAA
56ms
HTTPS
46ms
TLSA
102ms
SOA
28ms
MTA-STS
314ms
DNSSEC
118ms
SRV
83ms
Total
963ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-04 16:07:45 991ms 2 NS 2 A 2 MX 🔓 Insecure
2026-10-03 16:05:31 1077ms 2 NS 2 A 2 MX 🔓 Insecure
2026-10-02 19:08:39 806ms 2 NS 2 A 1 MX 🔓 Insecure
2026-09-29 18:43:09 shown 963ms 2 NS 2 A 1 MX 🔓 Insecure
2026-09-26 17:57:25 682ms 2 NS 2 A 1 MX 🔓 Insecure
2026-09-26 13:10:00 713ms 2 NS 2 A 1 MX 🔓 Insecure
2026-09-19 12:39:32 630ms 2 NS 2 A 1 MX 🔓 Insecure
2026-09-18 18:22:50 1900ms 2 NS 2 A 1 MX 🔓 Insecure
2026-09-11 15:24:39 1282ms 2 NS 2 A 1 MX 🔓 Insecure
2026-08-29 18:27:15 627ms 2 NS 2 A 1 MX 🔓 Insecure
2026-08-28 15:29:36 1636ms 2 NS 2 A 1 MX 🔓 Insecure
2026-08-23 01:26:15 1232ms 2 NS 2 A 1 MX 🔓 Insecure
2026-08-06 13:29:27 1254ms 2 NS 2 A 1 MX 🔓 Insecure
2026-07-22 07:31:32 17724ms 2 NS 2 A 1 MX 🔓 Insecure
2026-06-26 21:53:52 1082ms 2 NS 2 A 1 MX 🔓 Insecure
2026-06-21 17:54:42 880ms 2 NS 2 A 1 MX 🔓 Insecure
2026-06-18 05:39:40 788ms 2 NS 2 A 1 MX 🔓 Insecure
dhd.dk [/] search Domains, Hosts & DNS — .dk zone