duuo.dk

📜 Historical scan 2026-08-21 21:37:40 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

duuo.dk is a .dk domain served by 2 nameservers (odin.ns.cloudflare.com, reza.ns.cloudflare.com). It was registered on 3 July 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 198.202.211.1 is hosted by Cloudflare London, LLC (AS209242) in United States. Mail is handled by duuo-dk.mail.protection.outlook.com. The zone is not DNSSEC-signed, publishes a 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#

2 records 33ms

Nameserver	IP addresses	PTR	ASN / ISP
odin.ns.cloudflare.com	108.162.195.208 162.159.44.208 172.64.35.208 2606:4700:58::a29f:2cd0 2803:f800:50::6ca2:c3d0 2a06:98c1:50::ac40:23d0	odin.ns.cloudflare.com odin.ns.cloudflare.com odin.ns.cloudflare.com odin.ns.cloudflare.com odin.ns.cloudflare.com odin.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
reza.ns.cloudflare.com	108.162.192.217 172.64.32.217 173.245.58.217 2606:4700:50::adf5:3ad9 2803:f800:50::6ca2:c0d9 2a06:98c1:50::ac40:20d9	reza.ns.cloudflare.com reza.ns.cloudflare.com reza.ns.cloudflare.com reza.ns.cloudflare.com reza.ns.cloudflare.com reza.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

1 records 11ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
198.202.211.1	3600s	—	AS209242	Cloudflare London, LLC	198.202.211.0/24	🇺🇸 United States	—

📧 MX Records#

1 records 8ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	duuo-dk.mail.protection.outlook.com	2a01:111:f403:ca04::5 2a01:111:f403:ca04::9 2a01:111:f403:ca09::20 2a01:111:f403:ca09::8 52.101.68.16 52.101.68.32 52.101.73.11 52.101.73.6	mail-db3pr0202cu00205.inbound.protection.outlook.com mail-db7pr03cu00601.inbound.protection.outlook.com mail-as8pr05cu00400.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-db4pr02cu00400.inbound.protection.outlook.com mail-db3pr0202cu00200.inbound.protection.outlook.com mail-am1pr04cu00103.inbound.protection.outlook.com mail-am6pr04cu00306.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

7 records 114ms

TXT Record
canva-domain-verify=16a3c3fb-aa76-44b5-a964-e1b0cf2dc7e4
google-site-verification=d18x2ekPrUkF14UqXx7EqWDW9jWMpI5UmMtR9gTaIdQ
google-site-verification=QYEbk_w1djDxMelCJ3i6tDGLwI-_BrugnH_WPltDvIY
google-site-verification=VhvrwGiRqWQGiJMIvw7Kb9t2lW8zzcnZAPTmVOWCwp4
include:9329592.spf10.hubspotemail.net
openai-domain-verification=dv-ULVY3u6GolampMg8aYdrI8M5
v=spf1 include:spf.protection.outlook.com include:9329592.spf10.hubspotemail.net -all

✉️ SPF#

Policy	Record (duuo.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com include:9329592.spf10.hubspotemail.net -all

📨 DMARC#

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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-08 21:46:24

www CNAME	cdn.webflow.com (all on webflow.com) → 198.202.211.1 2620:cb:2000::1 (AS13335 AS209242)
www vs bare domain	Same network duuo.dk: 198.202.211.1 (AS209242) www.duuo.dk: 198.202.211.1 2620:cb:2000::1 (AS13335 AS209242)
Wildcard	No
Denial of existence	Compact NSEC (RFC 9824, "black lies") not walkable
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
selector1	selector1-duuo-dk._domainkey.duuo.onmicrosoft.com	RSA · ~1024 bit below 2048 bit
selector2	selector2-duuo-dk._domainkey.duuo.onmicrosoft.com	RSA · ~1024 bit below 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: 2/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

137ms

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

Key type	Algorithm	Public key
KSK	ECDSA P-256/SHA-256	mdsswUyr3DPW132mOi8V9xESWE8jTo0dxCjjnopK…
ZSK	ECDSA P-256/SHA-256	oJMRESz5E4gYzS/q6XDrvU1qMPYIjCWzJaOau8XN…

🏷️ SOA#

7ms

Field	Value
Serial	2411688320
Primary NS (MNAME)	odin.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 04:02:42

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2017-07-03
Expires	2027-07-31 (284d)

🔗 Same registrant#

0 domains

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

No other domain with this registrant in our WHOIS data yet

📋 WHOIS#

⏱️ Lookup Timing#

33ms

11ms

8ms

AAAA

26ms

TXT

114ms

CAA

24ms

HTTPS

31ms

TLSA

392ms

SOA

7ms

MTA-STS

50ms

DNSSEC

137ms

SRV

0ms

Total

6328ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-26 17:32:02	2547ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-24 16:54:37	3614ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-11 14:14:33	3068ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-04 11:09:22	2354ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-28 07:07:40	992ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-26 06:47:35	1584ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-21 21:37:40 shown	6328ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-11 04:25:57	4167ms	2 NS 1 A 1 MX	🔓 Insecure
2026-07-22 22:09:20	17103ms	2 NS 1 A 1 MX	🔓 Insecure
2026-07-16 19:16:15	41535ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-11 23:38:21	10439ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-03 11:12:51	9311ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-29 07:18:11	1537ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-27 19:06:04	1872ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-20 22:11:55	1154ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-17 05:05:44	664ms	2 NS 1 A 1 MX	🔓 Insecure