cuk.dk

📜 Historical scan 2026-06-16 23:11:45 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

cuk.dk is a .dk domain served by 3 nameservers (ns1.e-studio.dk, ns2.e-studio.dk, ns3.e-studio.dk). It was registered on 26 January 2001 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.200.90.178 is hosted by Christian Ebsen ApS (AS62121) in Denmark. Mail is handled by cuk.dk. The zone is not DNSSEC-signed, publishes a 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#

3 records 54ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.e-studio.dk	—	—	—
ns2.e-studio.dk	—	—	—
ns3.e-studio.dk	—	—	—

🌍 A Records#

1 records 51ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
193.200.90.178	—	web6.e-studio.dk	AS62121	Christian Ebsen ApS	193.200.90.0/23	🇩🇰 Denmark	—

📧 MX Records#

1 records 114ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	—	cuk.dk	193.200.90.178	web6.e-studio.dk	AS62121 Christian Ebsen ApS

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 328ms

TXT Record
v=spf1 ip4:193.200.90.178 include:_spf.e-studio.dk -all

✉️ SPF#

Policy	Record (cuk.dk)
-all (hard fail)	v=spf1 ip4:193.200.90.178 include:_spf.e-studio.dk -all

📨 DMARC#

Policy	Record (_dmarc.cuk.dk)
p=none (monitor only)	v=DMARC1; p=none;

📬 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 2026-10-12 08:12:56

www	94.231.106.8 (AS48854) (address records, no CNAME)
www vs bare domain	Same network cuk.dk: 94.231.106.8 (AS48854) www.cuk.dk: 94.231.106.8 (AS48854)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC zone can be walked (all names enumerable)
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

🔎 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#

176ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✓ Found
Flags	unsigned answer

🏷️ SOA#

74ms

Field	Value
Serial	2026061201
Primary NS (MNAME)	ns1.e-studio.dk
Responsible (RNAME)	hostmaster@mailrelay.e-studio.dk
Refresh	3600s
Retry	1800s
Expire	1209600s
Minimum (neg-cache TTL)	86400s

📋 Registration#

WHOIS fetched 2026-10-06 20:22:57

Field	Value
Registrar	Simply.com A/S
Registered	2001-01-26
Expires	2027-03-31 (164d)

📋 WHOIS#

⏱️ Lookup Timing#

54ms

51ms

114ms

AAAA

115ms

TXT

328ms

CAA

69ms

HTTPS

72ms

TLSA

2102ms

SOA

74ms

MTA-STS

76ms

DNSSEC

176ms

SRV

0ms

Total

2667ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-03 23:24:42	411ms	3 NS 1 A 0 MX	🔓 Insecure
2026-08-30 23:34:03	400ms	3 NS 1 A 0 MX	🔓 Insecure
2026-08-25 08:03:00	576ms	3 NS 1 A 1 MX	🔓 Insecure
2026-08-13 16:22:34	9701ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-21 02:06:40	720ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-19 23:29:47	1710ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-16 23:11:45 shown	2667ms	3 NS 1 A 1 MX	🔓 Insecure