42u.dk

📜 Historical scan 2026-09-22 05:47:06 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

42u.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 26 February 2003 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.88.14.84 is hosted by TDC Holding A/S (AS3292) in Denmark. Mail is handled by aspmx.l.google.com, alt1.aspmx.l.google.com and 3 more. 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 74ms

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 58ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
193.88.14.84	1500s	—	AS3292	TDC Holding A/S	193.88.0.0/15	🇩🇰 Denmark	—

📧 MX Records#

5 records 81ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	600s	aspmx.l.google.com	142.251.1.26 2a00:1450:4010:c1c::1b	lb-in-f26.1e100.net la-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	600s	alt1.aspmx.l.google.com	192.178.158.27 2404:6800:4013:813::1a	lcdels-in-f27.1e100.net lcdels-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	600s	alt2.aspmx.l.google.com	173.194.41.26 173.194.41.26 2404:6800:4001:c01::1a	mad01s14-in-f26.1e100.net yukulwh-in-f26.1e100.net yukulwh-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
10	600s	alt3.aspmx.l.google.com	172.253.158.26 2404:6800:4003:c26::1a	so-in-f26.1e100.net so-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	600s	alt4.aspmx.l.google.com	108.177.125.26 2404:6800:4008:c01::1b	tp-in-f26.1e100.net tp-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	42u.dk → 193.88.14.84
🔶 Autoconfig	42u.dk → 193.88.14.84

🔷 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 2026-10-12 01:51:32

www CNAME	42u.dk (all on 42u.dk) → 193.88.14.84 (AS3292)
www vs bare domain	Same network 42u.dk: 193.88.14.84 (AS3292) www.42u.dk: 193.88.14.84 (AS3292)
Wildcard	Yes: any name under the zone resolves
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

🔏 ACME Challenge#

Type	Name	Value
CNAME	_acme-challenge.42u.dk	42u.dk

🔗 TLSA / DANE#

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

🔐 DNSSEC#

256ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2026092001
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 2026-10-13 13:51:37

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2003-02-26
Expires	2027-02-28 (133d)

🔗 Same registrant#

3 domains

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

Domain	Registrar
hybrider.dk	Punktum dk A/S (direct)
probrid.dk	Punktum dk A/S (direct)
tronkærlund.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

74ms

58ms

81ms

AAAA

79ms

TXT

320ms

CAA

66ms

HTTPS

37ms

TLSA

1220ms

SOA

0ms

MTA-STS

142ms

DNSSEC

256ms

SRV

122ms

Total

2628ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-12 01:51:32	1646ms	2 NS 1 A 5 MX	🔒 Secure
2026-10-06 17:29:15	2216ms	2 NS 1 A 5 MX	🔒 Secure
2026-09-30 15:27:42	909ms	2 NS 1 A 5 MX	🔒 Secure
2026-09-22 05:47:06 shown	2628ms	2 NS 1 A 5 MX	🔒 Secure
2026-08-25 19:35:22	848ms	2 NS 1 A 5 MX	🔒 Secure
2026-08-16 20:04:39	5792ms	2 NS 1 A 5 MX	🔒 Secure
2026-06-27 08:54:44	1987ms	2 NS 1 A 5 MX	🔒 Secure
2026-06-26 19:41:40	1982ms	2 NS 1 A 5 MX	🔒 Secure
2026-06-16 12:59:35	3824ms	2 NS 1 A 5 MX	🔒 Secure