12u.dk

📜 Historical scan 2026-06-16 13:12:43 · ← 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. 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 1064ms

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

🌍 A Records#

1 records 1020ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
159.253.93.241	—	—	AS42903	—	—	—	Copenhagen

📧 MX Records#

1 records 1092ms

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#

1658ms

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

🏷️ SOA#

998ms

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#

1064ms

1020ms

1092ms

AAAA

1040ms

TXT

1771ms

CAA

926ms

HTTPS

861ms

TLSA

574ms

SOA

998ms

MTA-STS

1104ms

DNSSEC

1658ms

SRV

0ms

Total

6764ms

🕐 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 shown	6764ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-16 13:12:41	686ms	2 NS 1 A 1 MX	🔒 Secure