c-tan.dk

📜 Historical scan 2026-07-02 23:12:27 · ← Latest scan

🚫 Deactivated by the registry ⬇ Zone File 📜 Timeline & History ⚡ Scan Now

c-tan.dk is a .dk domain the registry has taken out of service: it is delegated to the registry's own sentinel nameservers (nonexistent.punktum.dk), so it does not resolve. It was registered on 7 December 2025 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. 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#

1 records 31ms

Nameserver	IP addresses	PTR	ASN / ISP
nonexistent.punktum.dk	—	—	—

🌍 A Records#

🌍

No A records found

📧 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 08:58:54

www	94.231.103.138 (AS48854) (address records, no CNAME)
www vs bare domain	Same network c-tan.dk: 94.231.103.138 (AS48854) www.c-tan.dk: 94.231.103.138 (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

🔗 TLSA / DANE#

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

🔐 DNSSEC#

66ms

Check	Result
Validation Status	❓ Unknown (the delegated nameservers don't answer)
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	resolution failed: failure

🏷️ SOA#

✗ No SOA record found

📋 Registration#

WHOIS fetched 2026-10-03 08:35:08

Field	Value
Registrar	Simply.com A/S
Registered	2025-12-07
Expires	2026-12-06 (49d)

📋 WHOIS#

⏱️ Lookup Timing#

31ms

33ms

28ms

AAAA

42ms

TXT

132ms

CAA

28ms

HTTPS

29ms

TLSA

30ms

SOA

33ms

MTA-STS

28ms

DNSSEC

66ms

SRV

39ms

Total

480ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-03 08:11:05	1922ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-30 07:58:09	492ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-26 13:34:29	525ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-22 11:53:42	473ms	3 NS 1 A 1 MX	🔒 Secure
2026-07-08 22:10:50	1110ms	3 NS 1 A 1 MX	🔒 Secure
2026-07-06 20:09:15	1991ms	1 NS 0 A 0 MX	❓ Unknown
2026-07-04 23:06:33	1032ms	1 NS 0 A 0 MX	❓ Unknown
2026-07-02 23:12:27 shown	480ms	1 NS 0 A 0 MX	❓ Unknown
2026-06-23 18:58:03	4278ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-23 16:31:01	894ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-21 21:23:08	2767ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-21 07:13:27	716ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-21 04:58:14	695ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-16 18:48:44	1624ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-16 18:40:39	306ms	0 NS 0 A 0 MX	❓ Unknown