3tn.dk

📜 Historical scan 2026-07-02 00:52:52  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

3tn.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was registered on 11 October 2005 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 144.76.37.211 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by mx1.onlinemail.io, mx2.onlinemail.io. The zone is DNSSEC-signed and validates, 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   225ms
NameserverIP addressesPTRASN / ISP
ns1.curanet.dk 185.25.141.12
2a02:2339:4006:108::123		 ns1.curanet.dk
ns1.curanet.dk		 AS48854 team.blue Denmark A/S
AS48854 team.blue Denmark A/S
ns2.curanet.dk 2a02:2339:1:10f::123:123
91.197.248.75		 ns2.curanet.dk
ns2.curanet.dk		 AS48854 team.blue Denmark A/S
AS48854 team.blue Denmark A/S

🌍 A Records#

1 records   212ms
IPTTLPTRASNISP / OrgCIDRCountryCity
144.76.37.211 3599s static.211.37.76.144.clients.your-server.de AS24940 Hetzner Online GmbH 144.76.0.0/16 🇩🇪 Germany Falkenstein

📧 MX Records#

2 records   218ms
PriorityTTLMail ServerIP addressesPTRASN
10 3599s mx1.onlinemail.io 185.21.42.12 mx1.onlinemail.io AS48854 team.blue Denmark A/S
20 3599s mx2.onlinemail.io 46.36.208.16 mx2.onlinemail.io AS48854 team.blue Denmark A/S

📧 Autodiscover / Autoconfig#

ServiceCNAME / IP
🔷 Autodiscoverautodiscover-mf.onlinemail.io → 185.21.40.62
🔶 Autoconfigautoconfig-mf.onlinemail.io → 185.21.40.62

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records   731ms
TXT Record
v=spf1 include:spf.onlinemail.io ?all

✉️ SPF#

PolicyRecord (3tn.dk)
?all (neutral) v=spf1 include:spf.onlinemail.io ?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 2026-10-08 05:18:44
www144.76.37.211 (AS24940) (address records, no CNAME)
www vs bare domainSame network
WildcardYes: any name under the zone resolves
Denial of existenceNSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEYNone 0 CDS, 0 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 3/10 · policy: ?all

  • warn "?all" is neutral: it gives receivers no guidance, much like having no SPF

🔗 TLSA / DANE#

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

🔐 DNSSEC#

584ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated

🏷️ SOA#

203ms
FieldValue
Serial2021111801
Primary NS (MNAME)ns1.curanet.dk
Responsible (RNAME)hostmaster@curanet.dk
Refresh14400s
Retry3600s
Expire1209600s
Minimum (neg-cache TTL)300s

📋 Registration#

WHOIS fetched 2026-10-07 01:40:44
FieldValue
RegistrarPunktum dk A/S (direct)
Registered2005-10-11
Expires2026-10-31 (14d)
📋 WHOIS#

⏱️ Lookup Timing#

NS
225ms
A
212ms
MX
218ms
AAAA
221ms
TXT
731ms
CAA
213ms
HTTPS
209ms
TLSA
217ms
SOA
203ms
MTA-STS
248ms
DNSSEC
584ms
SRV
233ms
Total
2085ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-08 05:18:44 469ms 2 NS 1 A 2 MX 🔒 Secure
2026-09-29 19:59:39 593ms 2 NS 1 A 2 MX 🔒 Secure
2026-09-26 20:51:36 459ms 2 NS 1 A 2 MX 🔒 Secure
2026-09-12 02:58:53 688ms 2 NS 1 A 2 MX 🔒 Secure
2026-07-02 00:52:52 shown 2085ms 2 NS 1 A 2 MX 🔒 Secure
2026-07-02 00:25:42 636ms 2 NS 1 A 2 MX 🔒 Secure
2026-06-16 12:39:50 869ms 2 NS 1 A 2 MX 🔒 Secure
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