firstclassonline.dk

📜 Historical scan 2026-06-20 14:28:11  ·  ← 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   117ms
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   291ms
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   576ms
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#

439ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsresolution failed: ncache nxrrset

🏷️ SOA#

289ms
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
117ms
A
159ms
MX
291ms
AAAA
156ms
TXT
576ms
CAA
217ms
HTTPS
164ms
TLSA
234ms
SOA
289ms
MTA-STS
266ms
DNSSEC
439ms
SRV
321ms
Total
4859ms

🕐 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 441ms 2 NS 0 A 1 MX 🔓 Insecure
2026-06-20 14:28:11 shown 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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