jduckertholding.dk

📜 Historical scan 2026-08-07 21:31:58 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

jduckertholding.dk is a .dk domain served by 2 nameservers (alfred.ns.cloudflare.com, carrera.ns.cloudflare.com). It was registered on 20 November 2023 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 212.237.249.17 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by jduckertholding-dk.mail.protection.outlook.com. 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#

2 records 34ms

Nameserver	IP addresses	PTR	ASN / ISP
alfred.ns.cloudflare.com	108.162.195.131 162.159.44.131 172.64.35.131 2606:4700:58::a29f:2c83 2803:f800:50::6ca2:c383 2a06:98c1:50::ac40:2383	alfred.ns.cloudflare.com alfred.ns.cloudflare.com alfred.ns.cloudflare.com alfred.ns.cloudflare.com alfred.ns.cloudflare.com alfred.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
carrera.ns.cloudflare.com	108.162.194.231 162.159.38.231 172.64.34.231 2606:4700:50::a29f:26e7 2803:f800:50::6ca2:c2e7 2a06:98c1:50::ac40:22e7	carrera.ns.cloudflare.com carrera.ns.cloudflare.com carrera.ns.cloudflare.com carrera.ns.cloudflare.com carrera.ns.cloudflare.com carrera.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 28ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
212.237.249.17	300s	splash.dandomain.dk	AS48854	team.blue Denmark A/S	212.237.248.0/23	🇩🇰 Denmark	—

📧 MX Records#

1 records 32ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	jduckertholding-dk.mail.protection.outlook.com	2a01:111:f403:ca04::2 2a01:111:f403:ca04::e 2a01:111:f403:ca09::3 2a01:111:f403:ca09::b 52.101.68.29 52.101.73.16 52.101.73.22 52.101.73.6	mail-du2pr03cu00102.inbound.protection.outlook.com mail-db8pr02cu00106.inbound.protection.outlook.com mail-am6pr04cu00303.inbound.protection.outlook.com mail-am7pr05cu00103.inbound.protection.outlook.com mail-dbapr03cu00105.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-am7pr05cu00106.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

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 52.98.228.56
🔶 Autoconfig	212.237.249.17

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 134ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records#

2 records 189ms

TXT Record
MS=ms17980696
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (jduckertholding.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com -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 2026-10-20 02:35:37

www	212.237.249.17 (AS48854) (address records, no CNAME)
www vs bare domain	Same network jduckertholding.dk: 212.237.249.17 (AS48854) www.jduckertholding.dk: 212.237.249.17 (AS48854)
Wildcard	Yes: any name under the zone resolves

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector1	selector1-jduckertholding-dk._domainkey.jduckertholding.onmicrosoft.com	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: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

122ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2411138219
Primary NS (MNAME)	alfred.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-17 01:45:16

Field	Value
Registrar	DANDOMAIN A/S
Registered	2023-11-20
Expires	2026-11-19 (25d)

🔗 Same registrant#

9 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).

Domain	Registrar
corepeople2.dk	Punktum dk A/S (direct)
dentyou.dk	Eurodns S.A
duckertholding.dk	DANDOMAIN A/S
gernyx-fotograf.dk	Punktum dk A/S (direct)
justface.dk	Punktum dk A/S (direct)
loft-rasmussen.dk	Punktum dk A/S (direct)
markholt-partners.dk	DANDOMAIN A/S
tallandsmall.dk	A/S SCANNET
zanity.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

34ms

28ms

32ms

AAAA

36ms

TXT

189ms

CAA

32ms

HTTPS

34ms

TLSA

170ms

SOA

0ms

MTA-STS

62ms

DNSSEC

122ms

SRV

134ms

Total

1368ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-20 02:35:37	1260ms	2 NS 1 A 1 MX	🔓 Insecure
2026-10-01 13:05:49	1366ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-22 08:11:55	2341ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-07 21:31:58 shown	1368ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-24 00:40:45	1209ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-20 03:31:17	3712ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-18 04:50:33	1274ms	2 NS 1 A 1 MX	🔓 Insecure