sifsdu.dk

📜 Historical scan 2026-09-27 21:12:00 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

sifsdu.dk is a .dk domain served by 3 nameservers (ns.second-ns.com, ns1.your-server.de, ns3.second-ns.de). It was registered on 27 October 2023 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 128.140.105.33 is hosted by Hetzner Online GmbH (AS24940) in Germany. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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#

3 records 45ms

Nameserver	IP addresses	PTR	ASN / ISP
ns.second-ns.com	213.239.204.242 2a01:4f8:0:a101::b:1	ns.second-ns.com ns.second-ns.com	AS24940 Hetzner Online GmbH AS24940 Hetzner Online GmbH
ns1.your-server.de	213.133.100.102 2a01:4f8:0:1::5ddc:1	ns1.your-server.de ns1.your-server.de	AS24940 Hetzner Online GmbH AS24940 Hetzner Online GmbH
ns3.second-ns.de	193.47.99.4 2001:67c:192c::add:b3	ns3.second-ns.de ns3.second-ns.de	AS12337 noris network AG AS12337 noris network AG

🌍 A Records#

1 records 46ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
128.140.105.33	7200s	static.33.105.140.128.clients.your-server.de	AS24940	Hetzner Online GmbH	128.140.0.0/17	🇩🇪 Germany	Nuremberg

📧 MX Records#

📧

No MX records found

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	128.140.105.33
🔶 Autoconfig	mail.your-server.de → 78.46.5.205

🔷 AAAA Records (IPv6)#

1 records 59ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2a01:4f8:c0c:4b8e::1	7200s	static.33.105.140.128.clients.your-server.de	AS24940	Hetzner Online GmbH	2a01:4f8:0:0:0:0:0:0/31	🇩🇪 Germany	—

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

2 records 120ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	0	100	443	mail.your-server.de
_imaps._tcp	0	100	993	mail.your-server.de

📝 TXT Records#

1 records 358ms

TXT Record
v=spf1 +a +mx ?all

✉️ SPF#

Policy	Record (sifsdu.dk)
?all (neutral)	v=spf1 +a +mx ?all

📨 DMARC#

Policy	Record (_dmarc.sifsdu.dk)
p=none (monitor only)	v=DMARC1; p=none;

📬 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 2026-10-09 01:45:55

www	128.140.105.33 2a01:4f8:c0c:4b8e::1 (AS24940) (address records, no CNAME)
www vs bare domain	Same network sifsdu.dk: 128.140.105.33 2a01:4f8:c0c:4b8e::1 (AS24940) www.sifsdu.dk: 128.140.105.33 2a01:4f8:c0c:4b8e::1 (AS24940)
Wildcard	Yes: any name under the zone resolves

🔎 SPF check#

zone-wide SPF report

DNS lookups: 2/10 · policy: ?all

warn "?all" is neutral: it gives receivers no guidance, much like having no SPF

🔗 TLSA / DANE#

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

🔐 DNSSEC#

2057ms

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	2025121100
Primary NS (MNAME)	ns1.your-server.de
Responsible (RNAME)	postmaster@your-server.de
Refresh	86400s
Retry	10800s
Expire	3600000s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-19 06:22:10

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2023-10-27
Expires	2026-10-26 (3d)

🔗 Same registrant#

2 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
arkobat.dk	Simply.com A/S
kristian-jorgensen.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

45ms

46ms

57ms

AAAA

59ms

TXT

358ms

CAA

52ms

HTTPS

69ms

TLSA

216ms

SOA

0ms

MTA-STS

79ms

DNSSEC

2057ms

SRV

120ms

Total

2556ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-04 00:20:15	854ms	3 NS 1 A 0 MX	🔓 Insecure
2026-09-30 15:20:21	829ms	3 NS 1 A 0 MX	🔓 Insecure
2026-09-27 21:12:00 shown	2556ms	3 NS 1 A 0 MX	🔓 Insecure
2026-06-25 01:19:59	801ms	3 NS 1 A 0 MX	🔓 Insecure
2026-06-19 09:17:36	6845ms	3 NS 1 A 0 MX	🔓 Insecure
2026-06-17 15:54:44	3869ms	3 NS 1 A 0 MX	🔓 Insecure