sikkerhedskursus.dk
Last scanned: 2026-08-28 08:49:30  ·  612ms total
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers4 records   167ms
NameserverIP addressesPTRASN / ISP
ns1.c1.sdc-hosting.com 185.152.201.34 backup004.c1.nordic-backup.com AS202567 Secure Data Center Aps
ns1.c2.sdc-hosting.com 185.152.200.31 backup001.c2.nordic-backup.com AS202567 Secure Data Center Aps
ns1.c3.sdc-hosting.com 38.77.132.2 ns1.c3.nordic-backup.com AS174 Cogent Communications, LLC
ns1.c4.sdc-hosting.com 38.77.132.3 ns1.c4.nordic-backup.com AS174 Cogent Communications, LLC
🌍 A Records
🌍
No A records found
📧 MX Records
📧
No MX records found
🔷 AAAA Records (IPv6)
✗ No AAAA records — IPv6 not configured
🔐 HTTPS Records
✗ No HTTPS RR — no SVCB/HTTPS service binding
📝 TXT Records1 records   221ms
TXT Record
v=spf1 mx -all
✉️ SPF
PolicyRecord (sikkerhedskursus.dk)
-all (hard fail) v=spf1 mx -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
🔗 TLSA / DANE
✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)
🔐 DNSSEC141ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsresolution failed: ncache nxrrset
🏷️ SOA0ms
FieldValue
Serial115
Primary NS (MNAME)ns1.c1.sdc-hosting.com
Responsible (RNAME)support@sdc-hosting.com
Refresh900s
Retry300s
Expire1209600s
Minimum (neg-cache TTL)86400s
📋 Registration
✗ No registration data — collected automatically when SOA serial changes
📋 WHOIS
⏱️ Lookup Timing
NS
167ms
A
165ms
MX
47ms
AAAA
72ms
TXT
221ms
CAA
175ms
HTTPS
72ms
TLSA
39ms
SOA
0ms
MTA-STS
98ms
DNSSEC
141ms
SRV
93ms
Total
612ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-08-28 08:49:30 612ms 4 NS 0 A 0 MX 🔓 Insecure View
2026-08-27 08:28:50 687ms 4 NS 0 A 0 MX 🔓 Insecure View
2026-06-29 12:41:55 4301ms 4 NS 0 A 0 MX 🔓 Insecure View
2026-06-22 23:10:58 2431ms 4 NS 0 A 0 MX 🔓 Insecure View
2026-06-20 20:14:25 950ms 0 NS 0 A 0 MX ❓ Unknown View
2026-06-17 15:23:18 711ms 4 NS 0 A 0 MX 🔓 Insecure View
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