c-klasse.dk

📜 Historical scan 2026-07-02 00:40:14  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

c-klasse.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was registered on 20 September 2011 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 87.104.6.138 is hosted by FIBIA P/S (AS44869) in Denmark. 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#

4 records   53ms
NameserverIP addressesPTRASN / ISP
ns1.simply.com 2a02:2339:1:15c::4562:4562
91.197.248.78		 ns1.simply.com
ns1.simply.com		 AS48854 team.blue Denmark A/S
AS48854 team.blue Denmark A/S
ns2.simply.com 185.25.141.15
2a02:2339:4006:101::4562:4562		 ns2.simply.com
ns2.simply.com		 AS48854 team.blue Denmark A/S
AS48854 team.blue Denmark A/S
ns3.simply.com 91.197.248.79 ns3.simply.com AS48854 team.blue Denmark A/S
ns4.simply.com 91.197.248.80 ns4.simply.com AS48854 team.blue Denmark A/S

🌍 A Records#

1 records   47ms
IPTTLPTRASNISP / OrgCIDRCountryCity
87.104.6.138 600s 87.104.6.138.static.fibianet.dk AS44869 FIBIA P/S 87.104.0.0/18 🇩🇰 Denmark Sorø

📧 MX Records#

📧
No MX records found

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

📝
No TXT records found

✉️ SPF#

✗ No SPF record — mail spoofing not restricted

📨 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 19:11:50
wwwNXDOMAIN
www vs bare domainwww does not resolve
c-klasse.dk: 87.104.6.138 (AS44869)
www.c-klasse.dk: no address
(all like this)
WildcardNo
Denial of existenceNSEC zone can be walked (all names enumerable)
CDS / CDNSKEYPublished: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

🔗 TLSA / DANE#

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

🔐 DNSSEC#

118ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated

🏷️ SOA#

37ms
FieldValue
Serial2022092204
Primary NS (MNAME)ns1.simply.com
Responsible (RNAME)hostmaster@simply.com
Refresh14400s
Retry3600s
Expire1209600s
Minimum (neg-cache TTL)3600s

📋 Registration#

WHOIS fetched 2026-10-13 23:55:06
FieldValue
RegistrarPunktum dk A/S (direct)
Registered2011-09-20
Expires2030-09-30 (1444d)

🔗 Same registrant#

3 domains

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

DomainRegistrar
b-klasse.dkPunktum dk A/S (direct)
simpleidea.dkPunktum dk A/S (direct)
zxspectrum.dkPunktum dk A/S (direct)
📋 WHOIS#

⏱️ Lookup Timing#

NS
53ms
A
47ms
MX
45ms
AAAA
60ms
TXT
106ms
CAA
48ms
HTTPS
57ms
TLSA
33ms
SOA
37ms
MTA-STS
70ms
DNSSEC
118ms
SRV
61ms
Total
626ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-08 19:11:50 1778ms 4 NS 1 A 0 MX 🔒 Secure
2026-10-02 14:50:16 576ms 4 NS 1 A 0 MX 🔒 Secure
2026-07-02 00:40:14 shown 626ms 4 NS 1 A 0 MX 🔒 Secure
2026-06-16 18:45:46 316ms 4 NS 1 A 0 MX 🔒 Secure
2026-06-16 18:40:03 655ms 4 NS 1 A 0 MX 🔒 Secure
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