jtu.dk

📜 Historical scan 2026-10-08 02:50:52 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

jtu.dk is a .dk domain served by 2 nameservers (ns1.designrus.dk, ns2.designrus.dk). It was registered on 5 October 1999 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 49.12.120.222 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by server1.designrus.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 51ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.designrus.dk	176.9.4.22 2a01:4f8:141:3416::2	server1.designrus.dk server1.designrus.dk	AS24940 Hetzner Online GmbH AS24940 Hetzner Online GmbH
ns2.designrus.dk	2a01:4f8:242:5649::2 49.12.124.182	server2.designrus.dk server2.designrus.dk	AS24940 Hetzner Online GmbH AS24940 Hetzner Online GmbH

🌍 A Records#

1 records 48ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
49.12.120.222	3600s	server4.designrus.dk	AS24940	Hetzner Online GmbH	49.12.0.0/15	🇩🇪 Germany	Falkenstein

📧 MX Records#

1 records 44ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	server1.designrus.dk	176.9.4.22 2a01:4f8:141:3416::2	server1.designrus.dk server1.designrus.dk	AS24940 Hetzner Online GmbH AS24940 Hetzner Online GmbH

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	jtu.dk → 49.12.120.222
🔶 Autoconfig	discover.designrus.dk → 49.12.124.182

🔷 AAAA Records (IPv6)#

1 records 56ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2a01:4f8:242:52a0::2	3600s	server4.designrus.dk	AS24940	Hetzner Online GmbH	2a01:4f8:0:0:0:0:0:0/31	🇩🇪 Germany	Falkenstein

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 106ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	1	1	443	discover.designrus.dk

📝 TXT Records#

1 records 276ms

TXT Record
v=spf1 mx a include:_spf.designrus.dk -all

✉️ SPF#

Policy	Record (jtu.dk)
-all (hard fail)	v=spf1 mx a include:_spf.designrus.dk -all

📨 DMARC#

Policy	Record (_dmarc.jtu.dk)
p=none (monitor only)	v=DMARC1; p=none; rua=mailto:postmaster@jtu.dk

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

1 records 43ms

Flags	Tag	Value
0	issue	letsencrypt.org

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-16 11:52:32

www	49.12.120.222 2a01:4f8:242:52a0::2 (AS24940) (address records, no CNAME)
www vs bare domain	Same network jtu.dk: 49.12.120.222 2a01:4f8:242:52a0::2 (AS24940) www.jtu.dk: 49.12.120.222 2a01:4f8:242:52a0::2 (AS24940)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC3 · 0 iterations · no salt · opt-out RFC 9276 ✓
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
default	—	RSA · ~1024 bit below 2048 bit

DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 3/10 · policy: -all

No problems found

🔏 ACME Challenge#

Type	Name	Value
CNAME	_acme-challenge.jtu.dk	jtu.dk

🔗 TLSA / DANE#

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

🔐 DNSSEC#

69ms

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

🏷️ SOA#

48ms

Field	Value
Serial	2026100502
Primary NS (MNAME)	ns1.designrus.dk
Responsible (RNAME)	admin@designrus.dk
Refresh	1200s
Retry	540s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-05 10:09:29

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	1999-10-05
Expires	2026-12-31 (75d)

📋 WHOIS#

⏱️ Lookup Timing#

51ms

48ms

44ms

AAAA

56ms

TXT

276ms

CAA

43ms

HTTPS

42ms

TLSA

247ms

SOA

48ms

MTA-STS

51ms

DNSSEC

69ms

SRV

106ms

Total

977ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-16 11:52:32	927ms	2 NS 1 A 1 MX	🔓 Insecure
2026-10-10 05:11:18	1096ms	2 NS 1 A 1 MX	🔓 Insecure
2026-10-08 02:50:52 shown	977ms	2 NS 1 A 1 MX	🔓 Insecure
2026-10-05 09:28:56	2164ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-29 08:53:45	857ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-24 06:31:28	954ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-17 17:56:53	1041ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-11 21:31:23	1492ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-04 19:55:12	1288ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-31 12:06:27	798ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-26 08:47:58	2822ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-25 08:12:04	8637ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-21 00:34:10	7096ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-15 16:39:07	1961ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-09 19:51:04	4136ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-08 11:42:17	9076ms	2 NS 1 A 1 MX	🔓 Insecure
2026-07-31 13:39:58	1114ms	2 NS 1 A 1 MX	❓ Unknown
2026-07-25 10:05:09	9164ms	2 NS 1 A 1 MX	🔓 Insecure
2026-07-20 13:01:20	1059ms	2 NS 1 A 1 MX	🔓 Insecure
2026-07-16 18:10:50	9819ms	2 NS 1 A 1 MX	🔓 Insecure
2026-07-11 01:43:32	1568ms	2 NS 1 A 1 MX	🔓 Insecure
2026-07-08 15:51:17	1271ms	2 NS 1 A 1 MX	🔓 Insecure
2026-07-01 01:27:15	1009ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-26 23:27:27	1085ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-22 14:13:10	1162ms	0 NS 0 A 0 MX	❓ Unknown