sk4.dk

📜 Historical scan 2026-09-21 09:00:36 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

sk4.dk is a .dk domain served by 5 nameservers (ns1.powerhosting.dk, ns2.powerhosting.dk, ns3.powerhosting.dk and 2 more). It was registered on 13 December 2021 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.31.76.91 is hosted by DLX A/S (AS47527) in Denmark. Mail is handled by mailscanner.powerhosting.dk, backup-mx.powerhosting.dk. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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#

5 records 36ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.powerhosting.dk	185.31.77.111 2a00:b920:3:1337:0:1:0:111	ns1.powerhosting.dk ns1.powerhosting.dk	AS47527 DLX A/S AS47527 DLX A/S
ns2.powerhosting.dk	2001:1af8:4700:a127:11::53 81.171.12.79	ns2.powerhosting.dk ns2.powerhosting.dk	AS60781 LeaseWeb Netherlands B.V. AS60781 LeaseWeb Netherlands B.V.
ns3.powerhosting.dk	2a00:b920:200::53 45.95.208.53	ns3.powerhosting.dk ns3.powerhosting.dk	AS47527 DLX A/S AS47527 DLX A/S
ns4.powerhosting.dk	2a00:b920:200::153 45.95.208.153	ns4.powerhosting.dk ns4.powerhosting.dk	AS47527 DLX A/S AS47527 DLX A/S
ns5.powerhosting.dk	2a01:4f8:c0c:12d2::2 88.99.227.45	ns5.powerhosting.dk ns5.powerhosting.dk	AS24940 Hetzner Online GmbH AS24940 Hetzner Online GmbH

🌍 A Records#

1 records 29ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.31.76.91	3600s	—	AS47527	DLX A/S	185.31.76.0/22	🇩🇰 Denmark	Herning

📧 MX Records#

2 records 29ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
50	3600s	mailscanner.powerhosting.dk	159.69.15.90 185.31.78.51 185.31.78.52 185.31.78.53 185.31.78.54 185.31.78.55 185.31.78.56 185.31.78.57 185.31.78.58 2a00:b920:3:1337:78::51 2a00:b920:3:1337:78::52 2a00:b920:3:1337:78::53 2a00:b920:3:1337:78::54 2a00:b920:3:1337:78::55 2a00:b920:3:1337:78::56 2a00:b920:3:1337:78::57 2a00:b920:3:1337:78::58 2a01:4f8:1c1c:2850::1 2a01:4f9:c010:6af1::1 95.217.132.35	mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk	AS24940 Hetzner Online GmbH AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS24940 Hetzner Online GmbH AS24940 Hetzner Online GmbH AS24940 Hetzner Online GmbH
100	3600s	backup-mx.powerhosting.dk	159.69.15.90 185.31.78.51 185.31.78.52 185.31.78.53 185.31.78.54 185.31.78.55 185.31.78.56 185.31.78.57 185.31.78.58 2a00:b920:3:1337:78::51 2a00:b920:3:1337:78::52 2a00:b920:3:1337:78::53 2a00:b920:3:1337:78::54 2a00:b920:3:1337:78::55 2a00:b920:3:1337:78::56 2a00:b920:3:1337:78::57 2a00:b920:3:1337:78::58 2a01:4f8:1c1c:2850::1 2a01:4f9:c010:6af1::1 95.217.132.35	mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk mailscanner.powerhosting.dk	AS24940 Hetzner Online GmbH AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S AS24940 Hetzner Online GmbH AS24940 Hetzner Online GmbH AS24940 Hetzner Online GmbH

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	185.31.76.91
🔶 Autoconfig	autoconfig.powerhosting.dk → 188.116.39.132

🔷 AAAA Records (IPv6)#

1 records 41ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2a00:b920:2:1337::91	3600s	—	AS47527	DLX A/S	2a00:b920:0:0:0:0:0:0/29	🇩🇰 Denmark	Herning

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

3 records 46ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	0	1	443	autodiscover.powerhosting.dk
_imap._tcp	20	10	143	mail1.powerhosting.dk
_imaps._tcp	10	10	993	mail1.powerhosting.dk

📝 TXT Records#

1 records 138ms

TXT Record
v=spf1 include:_spf.powerhosting.dk -all

✉️ SPF#

Policy	Record (sk4.dk)
-all (hard fail)	v=spf1 include:_spf.powerhosting.dk -all

📨 DMARC#

Policy	Record (_dmarc.sk4.dk)
p=reject	v=DMARC1; p=reject; pct=100; rua=mailto:dmarc@powerhosting.dk; ruf=mailto:dmarc@powerhosting.dk; adkim=r; aspf=r

📬 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 2026-10-16 00:36:54

www	185.31.76.91 2a00:b920:2:1337::91 (AS47527) (address records, no CNAME)
www vs bare domain	Same network sk4.dk: 185.31.76.91 2a00:b920:2:1337::91 (AS47527) www.sk4.dk: 185.31.76.91 2a00:b920:2:1337::91 (AS47527)
Wildcard	Yes: any name under the zone resolves

✍️ DKIM keys#

1 found

Selector	CNAME	Key
dkim	ph._domainkey.powerhosting.dk	RSA · ~1024 bit below 2048 bit

DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: -all

No problems found

🔏 ACME Challenge#

Type	Name	Value
CNAME	_acme-challenge.sk4.dk	_acme-challenge.powr.host

🔗 TLSA / DANE#

2 records 1321ms

Service / Owner	Type	Cert association
SMTP _25._tcp.backup-mx.powerhosting.dk	DANE-EE · SPKI · SHA-256	3C02E6711E7E08A1889E67D27C35D230…
SMTP _25._tcp.mailscanner.powerhosting.dk	DANE-EE · SPKI · SHA-256	3C02E6711E7E08A1889E67D27C35D230…

🔐 DNSSEC#

104ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA#

0ms

Field	Value
Serial	2026091701
Primary NS (MNAME)	ns1.powerhosting.dk
Responsible (RNAME)	zonemaster@powerhosting.dk
Refresh	10800s
Retry	3600s
Expire	604800s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-15 09:56:48

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2021-12-13
Expires	2026-12-12 (52d)

🔗 Same registrant#

5 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
hanstedegebjerg.dk	Punktum dk A/S (direct)
klub24horsens.dk	Punktum dk A/S (direct)
lokaldesign.dk	Punktum dk A/S (direct)
mshorsens.dk	Punktum dk A/S (direct)
simonkjaer.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

36ms

29ms

AAAA

41ms

TXT

138ms

CAA

43ms

HTTPS

35ms

TLSA

1321ms

SOA

0ms

MTA-STS

44ms

DNSSEC

104ms

SRV

46ms

Total

2441ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-16 00:36:54	3620ms	5 NS 1 A 2 MX	🔓 Insecure
2026-10-08 15:00:49	5911ms	5 NS 1 A 2 MX	🔓 Insecure
2026-10-02 10:27:53	664ms	5 NS 1 A 2 MX	🔓 Insecure
2026-10-01 07:15:15	1480ms	5 NS 1 A 2 MX	🔓 Insecure
2026-09-27 05:55:48	1069ms	5 NS 1 A 2 MX	🔓 Insecure
2026-09-24 07:48:53	1232ms	5 NS 1 A 2 MX	🔓 Insecure
2026-09-22 00:59:30	984ms	5 NS 1 A 2 MX	🔓 Insecure
2026-09-21 09:00:36 shown	2441ms	5 NS 1 A 2 MX	🔓 Insecure
2026-09-15 15:54:31	3565ms	5 NS 1 A 2 MX	🔓 Insecure
2026-09-08 15:01:23	1584ms	5 NS 1 A 2 MX	🔓 Insecure
2026-08-27 14:07:02	2244ms	5 NS 1 A 2 MX	🔓 Insecure
2026-08-20 21:47:03	5418ms	5 NS 1 A 2 MX	🔓 Insecure
2026-08-13 23:58:00	7939ms	5 NS 1 A 2 MX	🔓 Insecure
2026-08-08 09:34:39	12009ms	5 NS 1 A 2 MX	🔓 Insecure
2026-07-31 07:24:19	1922ms	5 NS 1 A 2 MX	🔓 Insecure
2026-07-23 07:15:51	2350ms	5 NS 1 A 2 MX	🔓 Insecure
2026-07-17 01:54:09	3428ms	5 NS 1 A 2 MX	🔓 Insecure
2026-07-12 00:03:16	2662ms	5 NS 1 A 2 MX	🔓 Insecure
2026-07-03 12:34:37	1131ms	5 NS 1 A 2 MX	🔓 Insecure
2026-06-25 02:44:20	1149ms	5 NS 1 A 2 MX	🔓 Insecure
2026-06-20 07:05:19	1393ms	5 NS 1 A 2 MX	🔓 Insecure
2026-06-18 10:46:22	2890ms	5 NS 1 A 2 MX	🔓 Insecure
2026-06-17 15:22:57	1851ms	5 NS 1 A 2 MX	🔓 Insecure