certain.dk

📜 Historical scan 2026-06-20 12:33:19  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

certain.dk is a .dk domain served by 2 nameservers (ns1.dns.services, ns2.dns.services). It was registered on 17 April 2026 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.210.177.56 is hosted by CoMaSys ApS (AS51377) in Denmark. Mail is handled by mail.certain.dk. 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   45ms
NameserverIP addressesPTRASN / ISP
ns1.dns.services 195.242.131.6
2001:67c:564:ffff::11		 ns1.dns.services
ns1.dns.services		 AS62121 Christian Ebsen ApS
AS62121 Christian Ebsen ApS
ns2.dns.services 2a00:1b18:2:3:3::2
62.69.152.37		 ns2.dns.services
37.34-46.152.69.62.in-addr.arpa		 AS47527 DLX A/S
AS47527 DLX A/S

🌍 A Records#

1 records   26ms
IPTTLPTRASNISP / OrgCIDRCountryCity
185.210.177.56 33546s 185-210-177-56.comasys.dk AS51377 CoMaSys ApS 185.210.176.0/22 🇩🇰 Denmark —

📧 MX Records#

1 records   64ms
PriorityTTLMail ServerIP addressesPTRASN
10 33546s mail.certain.dk 185.210.177.56 185-210-177-56.comasys.dk AS51377 CoMaSys ApS

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records   186ms
TXT Record
v=spf1 +a +mx include:_spf.comasys.dk -all

✉️ SPF#

PolicyRecord (certain.dk)
-all (hard fail) v=spf1 +a +mx include:_spf.comasys.dk -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 2026-10-16 08:58:54
www CNAMEcertain.dk (all on certain.dk)
www vs bare domainSame network
certain.dk: 185.210.177.56 (AS51377)
www.certain.dk: 185.210.177.56 (AS51377)
WildcardNo

🔎 SPF check#

zone-wide SPF report

DNS lookups: 5/10 · policy: -all

No problems found

🔏 ACME Challenge#

TypeNameValue
TXT _acme-challenge.certain.dk G65KTaY93MXB1va6xW-hgxlbIyi7cVl8dgQ54RChQTI

🔗 TLSA / DANE#

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

🔐 DNSSEC#

53ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer

🏷️ SOA#

66ms
FieldValue
Serial2026042501
Primary NS (MNAME)ns1.dns.services
Responsible (RNAME)jimmi@eventconsult.dk
Refresh10800s
Retry3600s
Expire1209600s
Minimum (neg-cache TTL)10800s

📋 Registration#

WHOIS fetched 2026-10-18 01:02:25
FieldValue
RegistrarPunktum dk A/S (direct)
Registered2026-04-17
Expires2027-04-16 (180d)

🔗 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#

NS
45ms
A
26ms
MX
64ms
AAAA
42ms
TXT
186ms
CAA
72ms
HTTPS
43ms
TLSA
47ms
SOA
66ms
MTA-STS
46ms
DNSSEC
53ms
SRV
100ms
Total
418ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-09-27 08:15:56 436ms 2 NS 1 A 1 MX 🔓 Insecure
2026-09-05 05:45:25 440ms 2 NS 1 A 1 MX 🔓 Insecure
2026-08-25 05:17:21 474ms 2 NS 1 A 1 MX 🔓 Insecure
2026-07-03 04:47:04 9631ms 2 NS 1 A 1 MX 🔓 Insecure
2026-06-25 16:49:54 588ms 2 NS 1 A 1 MX 🔓 Insecure
2026-06-24 09:05:06 1399ms 2 NS 1 A 1 MX 🔓 Insecure
2026-06-22 22:53:42 985ms 0 NS 0 A 0 MX ❓ Unknown
2026-06-20 12:33:19 shown 418ms 2 NS 1 A 1 MX 🔓 Insecure
2026-06-19 21:52:26 510ms 2 NS 1 A 1 MX 🔓 Insecure
2026-06-16 20:10:47 476ms 2 NS 1 A 1 MX 🔓 Insecure
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