port53.dk DNS records

🖥️ Nameservers7 records 91ms

Nameserver	IP addresses	PTR	ASN / ISP
ns21.cloudns.net	109.201.133.61 2a00:1768:1001:9::21	ns21.cloudns.net ns21.cloudns.net	AS43350 NForce Entertainment B.V. AS43350 NForce Entertainment B.V.
ns23.cloudns.net	185.10.19.116 2a07:8dc0:1b:0:72:4eff:febc:d52d	ns23.cloudns.net ns23.cloudns.net	AS35661 Virtua Systems SAS AS35661 Virtua Systems SAS
ns24.cloudns.net	185.206.180.71 2a0b:1640:1:1:1:1:213:845c	ns24.cloudns.net ns24.cloudns.net	AS205787 Public Cloud Ltd. AS205787 Public Cloud Ltd.
pns21.cloudns.net	185.136.96.96 2a06:fb00:1::1:96	pns21.cloudns.net pns21.cloudns.net	AS203391 Cloud DNS Ltd AS203391 Cloud DNS Ltd
pns22.cloudns.net	185.136.97.96 2a06:fb00:1::2:96	pns22.cloudns.net pns22.cloudns.net	AS203391 Cloud DNS Ltd AS203391 Cloud DNS Ltd
pns23.cloudns.net	185.136.98.96 2a06:fb00:1::3:96	pns23.cloudns.net pns23.cloudns.net	AS203391 Cloud DNS Ltd AS203391 Cloud DNS Ltd
pns24.cloudns.net	185.136.99.96 2a06:fb00:1::4:96	pns24.cloudns.net pns24.cloudns.net	AS203391 Cloud DNS Ltd AS203391 Cloud DNS Ltd

🌍 A Records1 records 73ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.107.169.23	3600s	—	AS24800	BornFiber Service Provider ApS	185.107.168.0/22	🇩🇰 Denmark	Rønne

📧 MX Records2 records 76ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	mailforward21.cloudns.net	109.201.133.110 2a00:1768:1001:9::23	mailforward21.cloudns.net mailforward21.cloudns.net	AS43350 NForce Entertainment B.V. AS43350 NForce Entertainment B.V.
20	3600s	mailforward22.cloudns.net	185.206.180.83 2a0b:1640:1:1:1:1:325:241	mf22-de.cloudmails.net mf22-de.cloudmails.net	AS205787 Public Cloud Ltd. AS205787 Public Cloud Ltd.

🔷 AAAA Records (IPv6)1 records 69ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2a00:4820:3f60:f00:9b03:9cf8:73f2:a355	3600s	mx.szn.dk	AS24800	BornFiber Service Provider ApS	2a00:4820:0:0:0:0:0:0/32	🇩🇰 Denmark	Rønne

🔐 HTTPS Records1 records 85ms

Priority	Target	SvcParams
10 service	.	alpn="h3,h2"

📝 TXT Records2 records 405ms

TXT Record
Port 53
v=spf1 include:_spf.szn.dk -all

✉️ SPF

Policy	Record (port53.dk)
-all (hard fail)	v=spf1 include:_spf.szn.dk -all

📨 DMARC

Policy	Record (_dmarc.port53.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:dmarc@port53.dk

📬 MTA-STS

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records3 records 91ms

Flags	Tag	Value
0	iodef	mailto:klaus@seistrup.dk
0	issue	letsencrypt.org
0	issue	zerossl.com

🔗 TLSA / DANE1 records 2665ms

Service / Owner	Type	Cert association
HTTPS _443._tcp.port53.dk	DANE-EE · SPKI · SHA-256	FC0C32BCA3D97FB2B22C3AECD6B878E4…

🔐 DNSSEC275ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA0ms

Field	Value
Serial	2026082002
Primary NS (MNAME)	ns21.cloudns.net
Responsible (RNAME)	kas@port53.dk
Refresh	7200s
Retry	1800s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

91ms

A

73ms

MX

76ms

AAAA

69ms

TXT

405ms

CAA

91ms

HTTPS

85ms

TLSA

2665ms

SOA

0ms

MTA-STS

148ms

DNSSEC

275ms

SRV

210ms

Total

10502ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-20 13:18:47	10502ms	7 NS 1 A 2 MX	🔒 Secure	View
2026-08-01 22:55:27	17713ms	7 NS 1 A 2 MX	🔒 Secure	View
2026-07-14 21:56:19	15889ms	7 NS 1 A 2 MX	🔒 Secure	View
2026-06-22 05:06:26	2111ms	7 NS 1 A 2 MX	🔒 Secure	View
2026-06-17 13:11:00	1737ms	7 NS 1 A 2 MX	🔒 Secure	View