3fu.dk
📜 Historical scan 2026-06-16 12:36:39  ·  ← Latest scan
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers2 records   58ms
NameserverIP addressesPTRASN / ISP
jay.ns.cloudflare.com — — —
uma.ns.cloudflare.com — — —
🌍 A Records2 records   53ms
IPTTLPTRASNISP / OrgCIDRCountryCity
104.21.68.197 — — AS13335 Cloudflare, Inc. 104.21.0.0/17 — —
172.67.198.39 — — AS13335 Cloudflare, Inc. 172.67.128.0/17 — —
📧 MX Records
📧
No MX records found
🔷 AAAA Records (IPv6)2 records   52ms
IPv6 AddressTTLPTRASNISP / OrgCIDRCountryCity
2606:4700:3031::ac43:c627 — — AS13335 Cloudflare, Inc. 2606:4700:3000::/42 — —
2606:4700:3037::6815:44c5 — — AS13335 Cloudflare, Inc. 2606:4700:3000::/42 — —
🔐 HTTPS Records1 records   44ms
PriorityTargetSvcParams
1 service . alpn="h3,h2" ipv4hint=104.21.68.197,172.67.198.39 ech=AEX+DQBBzAAgACCRSl2GarTD7edzme/SRSjBGfCZcUyEhedgk/e1csdNQwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::ac43:c627,2606:4700:3037::6815:44c5
📝 TXT Records1 records   121ms
TXT Record
v=spf1 -all
✉️ SPF
PolicyRecord (3fu.dk)
-all (hard fail) v=spf1 -all
📨 DMARC
PolicyRecord (_dmarc.3fu.dk)
p=reject v=DMARC1; p=reject; sp=reject; adkim=s; aspf=s;
📬 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)
🔐 DNSSEC165ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✓ Found
Flagsunsigned answer
🏷️ SOA52ms
FieldValue
Serial2406325849
Primary NS (MNAME)jay.ns.cloudflare.com
Responsible (RNAME)dns@cloudflare.com
Refresh10000s
Retry2400s
Expire604800s
Minimum (neg-cache TTL)1800s
📋 Registration
✗ No registration data — collected automatically when SOA serial changes
📋 WHOIS
⏱️ Lookup Timing
NS
58ms
A
53ms
MX
47ms
AAAA
52ms
TXT
121ms
CAA
43ms
HTTPS
44ms
TLSA
59ms
SOA
52ms
MTA-STS
40ms
DNSSEC
165ms
SRV
0ms
Total
563ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-08-18 21:20:21 19799ms 2 NS 2 A 0 MX 🔓 Insecure View
2026-08-03 12:55:11 8966ms 2 NS 2 A 0 MX 🔓 Insecure View
2026-07-27 12:46:56 8737ms 2 NS 2 A 0 MX 🔓 Insecure View
2026-07-26 12:14:49 3314ms 2 NS 2 A 0 MX 🔓 Insecure View
2026-07-01 23:13:13 1944ms 2 NS 2 A 0 MX 🔓 Insecure View
2026-06-16 12:36:39 563ms 2 NS 2 A 0 MX 🔓 Insecure View
dhd.dk [/] search Domains, Hosts & DNS — .dk zone