firstclassonline.dk

📜 Historical scan 2026-06-20 22:34:43  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

firstclassonline.dk is a .dk domain served by 2 nameservers (ns1.thx.dk, ns2.thx.dk). It was registered on 18 November 2018 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mail.thx.dk. The zone is not DNSSEC-signed, 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   32ms
NameserverIP addressesPTRASN / ISP
ns1.thx.dk 5.57.55.188 mail.thx.dk AS198608 Symbion A/S
ns2.thx.dk 5.57.55.189 — AS198608 Symbion A/S

🌍 A Records#

🌍
No A records found

📧 MX Records#

1 records   35ms
PriorityTTLMail ServerIP addressesPTRASN
10 3600s mail.thx.dk 5.57.55.188 mail.thx.dk AS198608 Symbion A/S

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records   162ms
TXT Record
v=spf1 mx:firstclassonline.dk -all

✉️ SPF#

PolicyRecord (firstclassonline.dk)
-all (hard fail) v=spf1 mx:firstclassonline.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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-16 05:35:07
wwwNXDOMAIN
www vs bare domainNeither resolves
firstclassonline.dk: no address
www.firstclassonline.dk: no address
WildcardNo

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

95ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsresolution failed: ncache nxrrset

🏷️ SOA#

34ms
FieldValue
Serial9
Primary NS (MNAME)ns1.thx.dk
Responsible (RNAME)michaelf@mentalnote.dk
Refresh900s
Retry600s
Expire86400s
Minimum (neg-cache TTL)3600s

📋 Registration#

WHOIS fetched 2026-10-11 17:29:14
FieldValue
RegistrarPunktum dk A/S (direct)
Registered2018-11-18
Expires2028-11-30 (775d)
📋 WHOIS#

⏱️ Lookup Timing#

NS
32ms
A
74ms
MX
35ms
AAAA
37ms
TXT
162ms
CAA
36ms
HTTPS
80ms
TLSA
74ms
SOA
34ms
MTA-STS
37ms
DNSSEC
95ms
SRV
128ms
Total
441ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-09-26 17:36:23 2741ms 2 NS 0 A 1 MX 🔓 Insecure
2026-09-07 23:12:13 2743ms 2 NS 0 A 1 MX 🔓 Insecure
2026-09-06 17:49:09 65535ms 2 NS 0 A 0 MX ❓ Unknown
2026-08-27 17:44:52 821ms 2 NS 0 A 1 MX 🔓 Insecure
2026-08-25 00:18:24 6172ms 2 NS 0 A 1 MX 🔓 Insecure
2026-06-20 22:34:43 shown 441ms 2 NS 0 A 1 MX 🔓 Insecure
2026-06-20 14:28:11 4859ms 2 NS 0 A 1 MX 🔓 Insecure
2026-06-17 10:12:56 732ms 2 NS 0 A 1 MX 🔓 Insecure
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