3u.dk
📜 Historical scan 2026-06-16 13:14:11  ·  ← Latest scan
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers3 records   59ms
NameserverIP addressesPTRASN / ISP
ns.inwx.de
ns2.inwx.de
ns3.inwx.eu
🌍 A Records1 records   61ms
📧 MX Records1 records   60ms
PriorityTTLMail ServerIP addressesPTRASN
10 mail.schmitz.pro 144.76.174.91 mail.schmitz.pro AS24940 Hetzner Online GmbH
🔷 AAAA Records (IPv6)1 records   61ms
IPv6 AddressTTLPTRASNISP / OrgCIDRCountryCity
2a01:4f8:200:5262::2 AS24940 Hetzner Online GmbH 2a01:4f8::/31 🇩🇪 Germany Falkenstein
🔐 HTTPS Records
✗ No HTTPS RR — no SVCB/HTTPS service binding
📝 TXT Records1 records   239ms
TXT Record
v=spf1 a mx ip4:144.76.174.91 ip6:2a01:4f8:200:5262::2 -all
✉️ SPF
PolicyRecord (3u.dk)
-all (hard fail) v=spf1 a mx ip4:144.76.174.91 ip6:2a01:4f8:200:5262::2 -all
📨 DMARC
PolicyRecord (_dmarc.3u.dk)
p=none (monitor only) v=DMARC1; p=none
📬 MTA-STS
✗ No MTA-STS policy — SMTP TLS not enforced
📈 TLSRPT
✗ No TLSRPT record — no SMTP TLS failure reporting
📜 CAA Records1 records   44ms
FlagsTagValue
128 issue letsencrypt.org
🔗 TLSA / DANE
✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)
🔐 DNSSEC157ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated
🏷️ SOA59ms
FieldValue
Serial2025071304
Primary NS (MNAME)ns.inwx.de
Responsible (RNAME)hostmaster@inwx.de
Refresh10800s
Retry3600s
Expire604800s
Minimum (neg-cache TTL)3600s
📋 Registration
✗ No registration data — collected automatically when SOA serial changes
📋 WHOIS
⏱️ Lookup Timing
NS
59ms
A
61ms
MX
60ms
AAAA
61ms
TXT
239ms
CAA
44ms
HTTPS
44ms
TLSA
362ms
SOA
59ms
MTA-STS
128ms
DNSSEC
157ms
SRV
0ms
Total
911ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-06-20 22:54:25 873ms 3 NS 1 A 1 MX 🔒 Secure View
2026-06-16 13:14:11 911ms 3 NS 1 A 1 MX 🔒 Secure View
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