studybook.dk

📜 Historical scan 2026-07-26 14:54:55 · ← Latest scan

🧟 Lame delegation ⬇ Zone File 📜 Timeline & History ⚡ Scan Now

studybook.dk is a registered .dk domain whose nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com) do not answer for it, so it is currently a lame delegation and does not resolve. It was registered on 7 January 2026 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. 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#

3 records 397ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.simply.com	2a02:2339:1:15c::4562:4562 91.197.248.78	ns1.simply.com ns1.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.simply.com	185.25.141.15 2a02:2339:4006:101::4562:4562	ns2.simply.com ns2.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns3.simply.com	91.197.248.79	ns3.simply.com	AS48854 team.blue Denmark A/S

🌍 A Records#

🌍

No A records found

📧 MX Records#

📧

No MX records found

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 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

🔗 TLSA / DANE#

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

🔐 DNSSEC#

494ms

Check	Result
Validation Status	❓ Unknown (the delegated nameservers don't answer)
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	resolution failed: failure

🏷️ SOA#

✗ No SOA record found

📋 Registration#

WHOIS fetched 2026-10-14 11:36:41

Field	Value
Registrar	Simply.com A/S
Registered	2026-01-07
Expires	2027-01-06 (80d)

🔗 Same registrant#

1 domain

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

Domain	Registrar
arzonic.dk	Simply.com A/S

📋 WHOIS#

⏱️ Lookup Timing#

397ms

103ms

454ms

AAAA

100ms

TXT

474ms

CAA

354ms

HTTPS

101ms

TLSA

476ms

SOA

28ms

MTA-STS

86ms

DNSSEC

494ms

SRV

423ms

Total

1690ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-30 21:59:56	1536ms	3 NS 0 A 0 MX	❓ Unknown
2026-08-23 15:07:30	4369ms	3 NS 0 A 0 MX	❓ Unknown
2026-08-22 14:14:04	1737ms	3 NS 0 A 0 MX	❓ Unknown
2026-08-21 13:54:33	2143ms	3 NS 0 A 0 MX	❓ Unknown
2026-08-20 13:25:01	6047ms	3 NS 0 A 0 MX	❓ Unknown
2026-08-19 06:09:32	4028ms	3 NS 0 A 0 MX	❓ Unknown
2026-08-18 02:06:36	1662ms	3 NS 0 A 0 MX	❓ Unknown
2026-08-16 19:02:50	1238ms	3 NS 0 A 0 MX	❓ Unknown
2026-08-13 18:47:46	3861ms	3 NS 0 A 0 MX	❓ Unknown
2026-08-11 23:26:39	3956ms	3 NS 0 A 0 MX	❓ Unknown
2026-08-10 20:35:19	1055ms	3 NS 0 A 0 MX	❓ Unknown
2026-08-09 13:53:20	10083ms	3 NS 0 A 0 MX	❓ Unknown
2026-08-04 01:29:46	10022ms	3 NS 0 A 0 MX	❓ Unknown
2026-08-01 23:07:36	983ms	3 NS 0 A 0 MX	❓ Unknown
2026-07-31 01:11:50	943ms	3 NS 0 A 0 MX	❓ Unknown
2026-07-29 23:19:35	3062ms	3 NS 0 A 0 MX	❓ Unknown
2026-07-28 16:29:07	1725ms	3 NS 0 A 0 MX	❓ Unknown
2026-07-27 15:19:46	16775ms	3 NS 0 A 0 MX	❓ Unknown
2026-07-26 14:54:55 shown	1690ms	3 NS 0 A 0 MX	❓ Unknown
2026-07-25 14:22:51	2460ms	3 NS 0 A 0 MX	❓ Unknown
2026-07-24 14:07:26	1197ms	3 NS 0 A 0 MX	❓ Unknown
2026-07-23 13:41:19	1244ms	3 NS 0 A 0 MX	❓ Unknown
2026-07-22 11:42:58	8816ms	3 NS 0 A 0 MX	❓ Unknown
2026-07-21 06:04:25	1432ms	3 NS 0 A 0 MX	❓ Unknown
2026-07-20 02:17:53	1118ms	3 NS 0 A 0 MX	❓ Unknown