certus.dk

📜 Historical scan 2026-06-16 20:10:38 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

certus.dk is a .dk domain served by 2 nameservers (ns1.seo-linuxpl.com, ns2.seo-linuxpl.com). It was registered on 22 August 2013 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 195.78.67.51 is hosted by Cyber_Folks S.A. (AS41079) in Poland. Mail is handled by mail.certus.dk. 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 78ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.seo-linuxpl.com	—	—	—
ns2.seo-linuxpl.com	—	—	—

🌍 A Records#

1 records 77ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
195.78.67.51	—	s173.cyber-folks.pl	AS41079	Cyber_Folks S.A.	195.78.66.0/23	🇵🇱 Poland	—

📧 MX Records#

1 records 79ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	—	mail.certus.dk	195.78.67.51	s173.cyber-folks.pl	AS41079 Cyber_Folks S.A.

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 306ms

TXT Record
v=spf1 a mx ip4:195.78.67.51 include:_spf.cyberfolks.pl -all

✉️ SPF#

Policy	Record (certus.dk)
-all (hard fail)	v=spf1 a mx ip4:195.78.67.51 include:_spf.cyberfolks.pl -all

📨 DMARC#

Policy	Record (_dmarc.certus.dk)
p=none (monitor only)	v=DMARC1; p=none; sp=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 00:18:32

www	195.78.67.51 (AS41079) (address records, no CNAME)
www vs bare domain	Same network certus.dk: 195.78.67.51 (AS41079) www.certus.dk: 195.78.67.51 (AS41079)
Wildcard	No

🔎 SPF check#

zone-wide SPF report

DNS lookups: 5/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

142ms

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

🏷️ SOA#

77ms

Field	Value
Serial	2024120500
Primary NS (MNAME)	ns1.seo-linuxpl.com
Responsible (RNAME)	hostmaster@certus.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-17 12:58:23

Field	Value
Registrar	WEB SOLUTIONS A/S
Registered	2013-08-22
Expires	2027-08-31 (316d)

🔗 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#

78ms

77ms

79ms

AAAA

67ms

TXT

306ms

CAA

73ms

HTTPS

77ms

TLSA

4039ms

SOA

77ms

MTA-STS

2093ms

DNSSEC

142ms

SRV

0ms

Total

6407ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-04 22:29:58	7174ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-27 05:50:17	13521ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-02 16:16:25	25951ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-27 13:49:59	2854ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-27 08:27:57	906ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-23 18:24:17	1140ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-16 20:10:38 shown	6407ms	2 NS 1 A 1 MX	🔓 Insecure