jku.dk

📜 Historical scan 2026-09-26 10:34:13 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

jku.dk is a .dk domain served by 2 nameservers (tani.ns.cloudflare.com, zeus.ns.cloudflare.com). It was registered on 12 October 2025 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.26.63 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by spamrelay.zxcs.nl. 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 43ms

Nameserver	IP addresses	PTR	ASN / ISP
tani.ns.cloudflare.com	108.162.192.224 172.64.32.224 173.245.58.224 2606:4700:50::adf5:3ae0 2803:f800:50::6ca2:c0e0 2a06:98c1:50::ac40:20e0	tani.ns.cloudflare.com tani.ns.cloudflare.com tani.ns.cloudflare.com tani.ns.cloudflare.com tani.ns.cloudflare.com tani.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
zeus.ns.cloudflare.com	108.162.193.249 172.64.33.249 173.245.59.249 2606:4700:58::adf5:3bf9 2803:f800:50::6ca2:c1f9 2a06:98c1:50::ac40:21f9	zeus.ns.cloudflare.com zeus.ns.cloudflare.com zeus.ns.cloudflare.com zeus.ns.cloudflare.com zeus.ns.cloudflare.com zeus.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 49ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.26.63	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.135.147	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 39ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	spamrelay.zxcs.nl	185.104.28.12 2a06:2ec0:1::ffec	spamrelay.zxcs.nl spamrelay.zxcs.nl	AS206281 Stichting DIGI NL AS206281 Stichting DIGI NL

🔷 AAAA Records (IPv6)#

2 records 48ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3030::6815:1a3f	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3031::ac43:8793	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 48ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.26.63,172.67.135.147 ech=AEX+DQBBeAAgACCw96XHRD9jgaVmQl1BtVu+b1L7uyIRcOzS1r9psPCGXgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::6815:1a3f,2606:4700:3031::ac43:8793

📝 TXT Records#

2 records 196ms

TXT Record
google-site-verification=kfIvjoNXBJlX1QrzLjunUgrfOF0VO1NOtpdCIlNfiBM
v=spf1 a mx ip4:185.104.29.152 ip6:2a06:2ec0:1::158 include:filter-out.zxcs.nl ~all

✉️ SPF#

Policy	Record (jku.dk)
~all (soft fail)	v=spf1 a mx ip4:185.104.29.152 ip6:2a06:2ec0:1::158 include:filter-out.zxcs.nl ~all

📨 DMARC#

Policy	Record (_dmarc.jku.dk)
p=none (monitor only)	v=DMARC1; p=none; sp=none;

📬 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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-03 11:16:47

www	Address record (no CNAME)
Wildcard	No

🔎 SPF check#

zone-wide SPF report

DNS lookups: 4/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

3 records 153ms

Service / Owner	Type	Cert association
SMTP _25._tcp.spamrelay.zxcs.nl	DANE-EE · SPKI · SHA-256	6D714328138B75C5845E6E154F40B899…
SMTP _25._tcp.spamrelay.zxcs.nl	DANE-TA · SPKI · SHA-256	6BD9212CE649C659C9CABC6CB60FCFFA…
SMTP _25._tcp.spamrelay.zxcs.nl	DANE-TA · SPKI · SHA-256	E1AE9C3DE848ECE1BA72E0D991AE4D0D…

🔐 DNSSEC#

69ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2415292185
Primary NS (MNAME)	tani.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-13 03:52:17

Field	Value
Registrar	Realtime Register B.V.
Registered	2025-10-12
Expires	2026-10-11 (expired)

📋 WHOIS#

⏱️ Lookup Timing#

43ms

49ms

39ms

AAAA

48ms

TXT

196ms

CAA

54ms

HTTPS

48ms

TLSA

153ms

SOA

0ms

MTA-STS

56ms

DNSSEC

69ms

SRV

62ms

Total

1268ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-21 13:44:18	341ms	1 NS 0 A 0 MX	❓ Unknown
2026-10-20 12:01:38	92ms	1 NS 0 A 0 MX	❓ Unknown
2026-10-19 10:06:08	99ms	1 NS 0 A 0 MX	❓ Unknown
2026-10-18 09:32:10	104ms	1 NS 0 A 0 MX	❓ Unknown
2026-10-17 09:19:28	418ms	1 NS 0 A 0 MX	❓ Unknown
2026-10-16 08:19:16	127ms	1 NS 0 A 0 MX	❓ Unknown
2026-10-15 06:57:59	224ms	1 NS 0 A 0 MX	❓ Unknown
2026-10-14 04:59:52	224ms	1 NS 0 A 0 MX	❓ Unknown
2026-10-13 03:25:47	616ms	1 NS 0 A 0 MX	❓ Unknown
2026-10-03 11:16:47	792ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-26 10:34:13 shown	1268ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-23 09:29:05	3122ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-21 02:18:07	876ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-06 19:19:06	10393ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-07 11:07:23	1124ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-22 19:28:09	2708ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-30 18:55:43	1111ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-23 00:16:36	1310ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-18 06:31:33	1242ms	2 NS 2 A 1 MX	🔓 Insecure