rt21.dk DNS records

🖥️ Nameservers4 records 53ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.dk	2001:df7:1d81:18::a 45.139.227.68	undefined.hostname.localhost 68.227.139.45.speedyvps.uk	AS142594 SpeedyPage Ltd AS142594 SpeedyPage Ltd
ns2.dk	212.95.58.14 2a00:c98:400f:104:1c00:a8ff:fe00:2ac	ns2.dnscluster.dk ns2.dnscluster.dk	AS28753 Leaseweb Deutschland GmbH AS28753 Leaseweb Deutschland GmbH
ns3.dk	213.184.84.70 2a09:3a00:4070::1	— —	AS59795 PerfGrid AS59795 PerfGrid
ns4.dk	2a06:a005:16d0:45::a 45.140.220.10	ns4.dnscluster.dk ns4.dnscluster.dk	AS142594 SpeedyPage Ltd AS142594 SpeedyPage Ltd

🌍 A Records1 records 51ms

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 Records2 records 172ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	60s	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	60s	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 Records1 records 317ms

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

📝 TXT Records2 records 719ms

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

🔏 ACME Challenge

Type	Name	Value
TXT	_acme-challenge.rt21.dk	15d6y1u2idMY7wXojkfGyeC8BbLsrle4daNk_Zg5YqI

🔗 TLSA / DANE

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

🔐 DNSSEC92ms

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

🏷️ SOA0ms

Field	Value
Serial	2026080201
Primary NS (MNAME)	ns1.dk
Responsible (RNAME)	server@hosting4real.com
Refresh	3600s
Retry	1800s
Expire	1209600s
Minimum (neg-cache TTL)	86400s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

53ms

A

51ms

MX

172ms

AAAA

170ms

TXT

719ms

CAA

177ms

HTTPS

168ms

TLSA

188ms

SOA

0ms

MTA-STS

196ms

DNSSEC

92ms

SRV

317ms

Total

1715ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-06 00:18:33	1715ms	4 NS 1 A 2 MX	🔓 Insecure	View
2026-07-27 07:27:33	1036ms	4 NS 1 A 2 MX	🔓 Insecure	View
2026-07-03 10:02:44	2792ms	4 NS 1 A 2 MX	🔓 Insecure	View
2026-06-26 20:02:13	2770ms	4 NS 1 A 2 MX	🔓 Insecure	View
2026-06-17 21:57:37	1357ms	4 NS 1 A 2 MX	🔓 Insecure	View