rt21.dk

📜 Historical scan 2026-06-26 20:02:13 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

rt21.dk is a .dk domain served by 4 nameservers (ns1.dk, ns2.dk, ns3.dk and 1 more). It was registered on 11 March 2019 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 213.184.85.14 is hosted by PerfGrid (AS59795) in The Netherlands. Mail is handled by pmg1.h4r.eu, pmg2.h4r.eu. The zone is not DNSSEC-signed, has no DMARC policy and has no IPv6 address. 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#

4 records 237ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.dk	2001:df7:1d81:18::a 45.139.227.68	— 68.227.139.45.speedyvps.uk	AS142594 SpeedyPage Ltd AS142594 SpeedyPage Ltd
ns2.dk	167.86.80.173 2a02:c207:2062:2513::1	vmi622513.contaboserver.net vmi622513.contaboserver.net	AS51167 Contabo GmbH AS51167 Contabo GmbH
ns3.dk	213.184.84.71 2a09:3a00:4071::1	— —	AS59795 PerfGrid AS59795 PerfGrid
ns4.dk	2a01:4f8:c012:e6d6::1 49.12.71.195	— static.195.71.12.49.clients.your-server.de	AS24940 Hetzner Online GmbH AS24940 Hetzner Online GmbH

🌍 A Records#

1 records 220ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
213.184.85.14	60s	nlcp05.hosting4real.net	AS59795	PerfGrid	213.184.84.0/23	🇳🇱 The Netherlands	—

📧 MX Records#

2 records 281ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	pmg1.h4r.eu	2a01:4f8:c012:7e77::1 49.12.11.203	pmg1.h4r.eu filter02.h4r.eu	AS24940 Hetzner Online GmbH AS24940 Hetzner Online GmbH
20	300s	pmg2.h4r.eu	2001:41d0:701:1100::a6bc 57.129.66.76	filter04.h4r.eu filter04.h4r.eu	AS16276 OVH SAS AS16276 OVH SAS

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	213.184.85.14
🔶 Autoconfig	213.184.85.14

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 285ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	0	0	443	cpanelemaildiscovery.cpanel.net

📝 TXT Records#

2 records 522ms

TXT Record
klaviyo-site-verification=SJDihp
v=spf1 +a +mx +ip4:213.184.85.14 include:_relayspf.hosting4real.net ~all

✉️ SPF#

Policy	Record (rt21.dk)
~all (soft fail)	v=spf1 +a +mx +ip4:213.184.85.14 include:_relayspf.hosting4real.net ~all

📨 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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-08 22:47:38

www	213.184.85.14 (AS59795) (address records, no CNAME)
www vs bare domain	Same network rt21.dk: 213.184.85.14 (AS59795) www.rt21.dk: 213.184.85.14 (AS59795)
Wildcard	No

✍️ DKIM keys#

1 found

Selector	CNAME	Key
default	—	RSA · ~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: 4/10 · policy: ~all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.rt21.dk	ScU5AEK2CTWba7L9TIdOQECPxgUkNCyLUARl2qwTTr0

🔗 TLSA / DANE#

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

🔐 DNSSEC#

320ms

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

🏷️ SOA#

214ms

Field	Value
Serial	2026052701
Primary NS (MNAME)	ns1.dk
Responsible (RNAME)	server@hosting4real.com
Refresh	3600s
Retry	1800s
Expire	1209600s
Minimum (neg-cache TTL)	86400s

📋 Registration#

WHOIS fetched 2026-10-06 22:46:34

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2019-03-11
Expires	2036-03-31 (3452d)

📋 WHOIS#

⏱️ Lookup Timing#

237ms

220ms

281ms

AAAA

223ms

TXT

522ms

CAA

279ms

HTTPS

228ms

TLSA

750ms

SOA

214ms

MTA-STS

254ms

DNSSEC

320ms

SRV

285ms

Total

2770ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-03 20:20:27	1535ms	4 NS 1 A 2 MX	🔓 Insecure
2026-09-27 21:54:12	1403ms	4 NS 1 A 2 MX	🔓 Insecure
2026-09-27 03:10:40	1275ms	4 NS 1 A 2 MX	🔓 Insecure
2026-09-11 17:02:19	1074ms	4 NS 1 A 2 MX	🔓 Insecure
2026-09-04 13:29:12	3516ms	4 NS 1 A 2 MX	🔓 Insecure
2026-08-06 00:18:33	1715ms	4 NS 1 A 2 MX	🔓 Insecure
2026-07-27 07:27:33	1036ms	4 NS 1 A 2 MX	🔓 Insecure
2026-07-03 10:02:44	2792ms	4 NS 1 A 2 MX	🔓 Insecure
2026-06-26 20:02:13 shown	2770ms	4 NS 1 A 2 MX	🔓 Insecure
2026-06-17 21:57:37	1357ms	4 NS 1 A 2 MX	🔓 Insecure