serfurth.dk

📜 Historical scan 2026-06-29 10:53:49 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

serfurth.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 1 October 2018 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 88.198.195.21 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by mail.protonmail.ch, mailsec.protonmail.ch. 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 46ms

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
88.198.195.21	7200s	www131.your-server.de	AS24940	Hetzner Online GmbH	88.198.0.0/16	🇩🇪 Germany	Nuremberg

📧 MX Records#

2 records 45ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	7200s	mail.protonmail.ch	176.119.200.128 185.205.70.128 185.70.42.128	mail.protonmail.ch mail.protonmail.ch mail.protonmail.ch	AS62371 Proton AG AS62371 Proton AG AS62371 Proton AG
20	7200s	mailsec.protonmail.ch	176.119.200.129 185.205.70.129 185.70.42.129	mailsec.protonmail.ch mailsec.protonmail.ch mailsec.protonmail.ch	AS62371 Proton AG AS62371 Proton AG AS62371 Proton AG

🔷 AAAA Records (IPv6)#

1 records 45ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2a01:4f8:d0a:10ff::2	7200s	www131.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

📝 TXT Records#

2 records 318ms

TXT Record
protonmail-verification=e4072429a8aafa7a72dcfa179c4c8c4ee4d37904
v=spf1 include:_spf.protonmail.ch ~all

✉️ SPF#

Policy	Record (serfurth.dk)
~all (soft fail)	v=spf1 include:_spf.protonmail.ch ~all

📨 DMARC#

Policy	Record (_dmarc.serfurth.dk)
p=quarantine	v=DMARC1; p=quarantine

📬 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 14:19:37

www	88.198.195.21 2a01:4f8:d0a:10ff::2 (AS24940) (address records, no CNAME)
www vs bare domain	Same network serfurth.dk: 88.198.195.21 2a01:4f8:d0a:10ff::2 (AS24940) www.serfurth.dk: 88.198.195.21 2a01:4f8:d0a:10ff::2 (AS24940)
Wildcard	No

🔎 SPF check#

zone-wide SPF report

DNS lookups: 2/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

4 records 418ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mail.protonmail.ch	DANE-EE · SPKI · SHA-256	76BB66711DA416433CA890A5B2E5A053…
SMTP _25._tcp.mail.protonmail.ch	DANE-EE · SPKI · SHA-256	6111A5698D23C89E09C36FF833C1487E…
SMTP _25._tcp.mailsec.protonmail.ch	DANE-EE · SPKI · SHA-256	76BB66711DA416433CA890A5B2E5A053…
SMTP _25._tcp.mailsec.protonmail.ch	DANE-EE · SPKI · SHA-256	6111A5698D23C89E09C36FF833C1487E…

🔐 DNSSEC#

152ms

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

🏷️ SOA#

46ms

Field	Value
Serial	2026021102
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 2026-10-07 07:49:38

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2018-10-01
Expires	2027-10-31 (379d)

📋 WHOIS#

⏱️ Lookup Timing#

46ms

45ms

AAAA

45ms

TXT

318ms

CAA

45ms

HTTPS

80ms

TLSA

418ms

SOA

46ms

MTA-STS

84ms

DNSSEC

152ms

SRV

95ms

Total

1362ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-09 14:19:37	1470ms	3 NS 1 A 2 MX	🔓 Insecure
2026-06-29 10:53:49 shown	1362ms	3 NS 1 A 2 MX	🔓 Insecure
2026-06-22 22:24:33	2066ms	3 NS 1 A 2 MX	🔓 Insecure
2026-06-20 22:21:06	1019ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-19 20:45:07	1007ms	3 NS 1 A 2 MX	🔓 Insecure
2026-06-17 13:58:07	3251ms	3 NS 1 A 2 MX	🔓 Insecure