certain.dk
📜 Historical scan 2026-06-20 12:33:19  ·  ← Latest scan
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers2 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 Records1 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 Records1 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 Records1 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
🔏 ACME Challenge
TypeNameValue
TXT _acme-challenge.certain.dk G65KTaY93MXB1va6xW-hgxlbIyi7cVl8dgQ54RChQTI
🔗 TLSA / DANE
✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)
🔐 DNSSEC53ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer
🏷️ SOA66ms
FieldValue
Serial2026042501
Primary NS (MNAME)ns1.dns.services
Responsible (RNAME)jimmi@eventconsult.dk
Refresh10800s
Retry3600s
Expire1209600s
Minimum (neg-cache TTL)10800s
📋 Registration
✗ No registration data — collected automatically when SOA serial changes
📋 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
2026-08-25 05:17:21 474ms 2 NS 1 A 1 MX 🔓 Insecure View
2026-07-03 04:47:04 9631ms 2 NS 1 A 1 MX 🔓 Insecure View
2026-06-25 16:49:54 588ms 2 NS 1 A 1 MX 🔓 Insecure View
2026-06-24 09:05:06 1399ms 2 NS 1 A 1 MX 🔓 Insecure View
2026-06-22 22:53:42 985ms 0 NS 0 A 0 MX ❓ Unknown View
2026-06-20 12:33:19 418ms 2 NS 1 A 1 MX 🔓 Insecure View
2026-06-19 21:52:26 510ms 2 NS 1 A 1 MX 🔓 Insecure View
2026-06-16 20:10:47 476ms 2 NS 1 A 1 MX 🔓 Insecure View
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