12u.dk

📜 Historical scan 2026-06-16 13:12:41 · ← 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 38ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.one.com	—	—	—
ns02.one.com	—	—	—

🌍 A Records#

1 records 51ms

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

📧 MX Records#

1 records 38ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	—	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

🔗 TLSA / DANE#

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

🔐 DNSSEC#

146ms

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

🏷️ SOA#

41ms

Field	Value
Serial	2026052401
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#

38ms

51ms

38ms

AAAA

48ms

TXT

127ms

CAA

45ms

HTTPS

44ms

TLSA

210ms

SOA

41ms

MTA-STS

91ms

DNSSEC

146ms

SRV

0ms

Total

686ms

🕐 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	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 shown	686ms	2 NS 1 A 1 MX	🔒 Secure