theopen.dk DNS records

🖥️ Nameservers2 records 77ms

Nameserver	IP addresses	PTR	ASN / ISP
alexia.ns.cloudflare.com	108.162.194.175 162.159.38.175 172.64.34.175 2606:4700:50::a29f:26af 2803:f800:50::6ca2:c2af 2a06:98c1:50::ac40:22af	alexia.ns.cloudflare.com alexia.ns.cloudflare.com alexia.ns.cloudflare.com alexia.ns.cloudflare.com alexia.ns.cloudflare.com alexia.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
dom.ns.cloudflare.com	108.162.193.157 172.64.33.157 173.245.59.157 2606:4700:58::adf5:3b9d 2803:f800:50::6ca2:c19d 2a06:98c1:50::ac40:219d	dom.ns.cloudflare.com dom.ns.cloudflare.com dom.ns.cloudflare.com dom.ns.cloudflare.com dom.ns.cloudflare.com dom.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records

🌍

No A records found

📧 MX Records3 records 70ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	mxext1.mailbox.org	2001:67c:2050:104:0:1:25:1 80.241.60.212	mx1.mailbox.org mx1.mailbox.org	AS199118 Heinlein-Support GmbH AS199118 Heinlein-Support GmbH
10	300s	mxext2.mailbox.org	2001:67c:2050:104:0:2:25:1 80.241.60.215	mx2.mailbox.org mx2.mailbox.org	AS199118 Heinlein-Support GmbH AS199118 Heinlein-Support GmbH
20	300s	mxext3.mailbox.org	2001:67c:2050:104:0:3:25:1 80.241.60.216	mx3.mailbox.org mx3.mailbox.org	AS199118 Heinlein-Support GmbH AS199118 Heinlein-Support GmbH

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records1 records 344ms

TXT Record
v=spf1 include:mailbox.org ~all

✉️ SPF

Policy	Record (theopen.dk)
~all (soft fail)	v=spf1 include:mailbox.org ~all

📨 DMARC

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

📬 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

🔗 TLSA / DANE9 records 247ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mxext1.mailbox.org	DANE-EE · SPKI · SHA-256	E41CC7633029AFDBA53744D7E5FC31EF…
SMTP _25._tcp.mxext1.mailbox.org	DANE-EE · SPKI · SHA-256	996AD31D65E03F038B8EC950F6F26611…
SMTP _25._tcp.mxext1.mailbox.org	DANE-EE · SPKI · SHA-256	4758AF6F02DFB5DC8795FA402E77A8A0…
SMTP _25._tcp.mxext2.mailbox.org	DANE-EE · SPKI · SHA-256	4758AF6F02DFB5DC8795FA402E77A8A0…
SMTP _25._tcp.mxext2.mailbox.org	DANE-EE · SPKI · SHA-256	996AD31D65E03F038B8EC950F6F26611…
SMTP _25._tcp.mxext2.mailbox.org	DANE-EE · SPKI · SHA-256	E41CC7633029AFDBA53744D7E5FC31EF…
SMTP _25._tcp.mxext3.mailbox.org	DANE-EE · SPKI · SHA-256	996AD31D65E03F038B8EC950F6F26611…
SMTP _25._tcp.mxext3.mailbox.org	DANE-EE · SPKI · SHA-256	E41CC7633029AFDBA53744D7E5FC31EF…
SMTP _25._tcp.mxext3.mailbox.org	DANE-EE · SPKI · SHA-256	4758AF6F02DFB5DC8795FA402E77A8A0…

🔐 DNSSEC223ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	resolution failed: ncache nxrrset

🏷️ SOA0ms

Field	Value
Serial	2413369208
Primary NS (MNAME)	alexia.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

77ms

A

93ms

MX

70ms

AAAA

95ms

TXT

344ms

CAA

101ms

HTTPS

69ms

TLSA

247ms

SOA

0ms

MTA-STS

130ms

DNSSEC

223ms

SRV

146ms

Total

3849ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-28 16:58:11	3849ms	2 NS 0 A 3 MX	🔓 Insecure	View
2026-08-27 15:08:52	1023ms	2 NS 0 A 3 MX	🔓 Insecure	View
2026-08-27 14:06:18	2144ms	2 NS 0 A 3 MX	🔓 Insecure	View
2026-08-07 15:42:06	1664ms	2 NS 0 A 3 MX	🔓 Insecure	View
2026-06-22 01:15:56	593ms	2 NS 0 A 3 MX	🔓 Insecure	View
2026-06-19 15:04:41	780ms	2 NS 0 A 3 MX	🔓 Insecure	View
2026-06-18 01:05:37	3279ms	2 NS 0 A 3 MX	🔓 Insecure	View