12u.dk

📜 Historical scan 2026-09-04 09:42:06 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

12u.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 11 March 2003 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 159.253.93.241 is hosted by Itm8 A/S (AS42903) in Denmark. Mail is handled by spamfilter.guldfisk.dk. 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#

2 records 15ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.one.com	195.206.121.10 2001:67c:28cc::10	ns01.one.com ns01.one.com	AS197495 One.com A/S AS197495 One.com A/S
ns02.one.com	185.10.11.10 2001:67c:3c0::10	ns02.one.com ns02.one.com	AS51468 One.com A/S AS51468 One.com A/S

🌍 A Records#

1 records 8ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
159.253.93.241	43200s	—	AS42903	Itm8 A/S	159.253.88.0/21	🇩🇰 Denmark	Frederiksværk

📧 MX Records#

1 records 32ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	43200s	spamfilter.guldfisk.dk	194.255.97.44	—	AS3308 Norlys Telco A/S

🔷 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 2026-10-09 10:57:23

www CNAME	12u.dk (all on 12u.dk) → 159.253.93.241 (AS42903)
www vs bare domain	Same network 12u.dk: 159.253.93.241 (AS42903) www.12u.dk: 159.253.93.241 (AS42903)
Wildcard	Yes: any name under the zone resolves
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

🔏 ACME Challenge#

Type	Name	Value
CNAME	_acme-challenge.12u.dk	12u.dk

🔗 TLSA / DANE#

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

🔐 DNSSEC#

130ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

Key type	Algorithm	Public key
KSK	ECDSA P-256/SHA-256	46pWbEWrs9TgfdkCEGNQAMNAk2VbX0WHC2Fcw/PO…
ZSK	ECDSA P-256/SHA-256	Lzefx4FNXHPMJDjNiNmcm1u5QlgBVL//VBOoNpiy…

🏷️ SOA#

13ms

Field	Value
Serial	2026082401
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

WHOIS fetched 2026-10-07 10:18:10

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2003-03-11
Expires	2027-03-31 (165d)

📋 WHOIS#

⏱️ Lookup Timing#

15ms

8ms

32ms

AAAA

49ms

TXT

54ms

CAA

25ms

HTTPS

26ms

TLSA

144ms

SOA

13ms

MTA-STS

7ms

DNSSEC

130ms

SRV

0ms

Total

849ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-09 10:57:23	1091ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-27 00:43:08	658ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-25 14:16:29	736ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-23 13:38:55	1099ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-04 09:42:06 shown	849ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-26 17:55:59	650ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-25 05:27:52	2692ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-30 14:41:34	665ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-16 13:12:43	6764ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-16 13:12:41	686ms	2 NS 1 A 1 MX	🔒 Secure