studieboeger.dk

📜 Historical scan 2026-09-11 15:24:39  ·  ← 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   50ms
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   36ms
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   31ms
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   43ms
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   41ms
PriorityTargetSvcParams
1 service . alpn="h3,h2" ipv4hint=104.21.15.245,172.67.165.85 ech=AEX+DQBBIgAgACDILJPx3V1Dy2LHOSy6uqXSCgVSB7yvueKtom8x+r3PCQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:ff5,2606:4700:3035::ac43:a555

🔌 SRV Records#

1 records   77ms
ServicePriorityWeightPortTarget
_imaps._tcp 0 1 993 mail.mahoje.dk

📝 TXT Records#

1 records   189ms
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#

217ms
CheckResult
Status🧪 Testing
TXT record (_mta-sts)✓ Found
HTTPS policy✓ Valid
Modetesting
Policy ID9698806436038367355
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#

75ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer

🏷️ SOA#

0ms
FieldValue
Serial2413475055
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 (89d)
📋 WHOIS#

⏱️ Lookup Timing#

NS
50ms
A
36ms
MX
31ms
AAAA
43ms
TXT
189ms
CAA
44ms
HTTPS
41ms
TLSA
68ms
SOA
0ms
MTA-STS
217ms
DNSSEC
75ms
SRV
77ms
Total
1282ms

🕐 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 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 shown 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