s4f.dk

📜 Historical scan 2026-08-21 12:36:36 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

s4f.dk is a .dk domain served by 2 nameservers (lakas.ns.cloudflare.com, piper.ns.cloudflare.com). It was registered on 12 June 2019 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 188.114.96.1 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by s4f-dk.mail.protection.outlook.com. 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#

2 records 44ms

Nameserver	IP addresses	PTR	ASN / ISP
lakas.ns.cloudflare.com	108.162.193.194 172.64.33.194 173.245.59.194 2606:4700:58::adf5:3bc2 2803:f800:50::6ca2:c1c2 2a06:98c1:50::ac40:21c2	lakas.ns.cloudflare.com lakas.ns.cloudflare.com lakas.ns.cloudflare.com lakas.ns.cloudflare.com lakas.ns.cloudflare.com lakas.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
piper.ns.cloudflare.com	108.162.194.35 162.159.38.35 172.64.34.35 2606:4700:50::a29f:2623 2803:f800:50::6ca2:c223 2a06:98c1:50::ac40:2223	piper.ns.cloudflare.com piper.ns.cloudflare.com piper.ns.cloudflare.com piper.ns.cloudflare.com piper.ns.cloudflare.com piper.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

2 records 44ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
188.114.96.1	300s	—	AS13335	Cloudflare, Inc.	188.114.96.0/22	—	—
188.114.97.1	300s	—	AS13335	Cloudflare, Inc.	188.114.96.0/22	—	—

📧 MX Records#

1 records 36ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	s4f-dk.mail.protection.outlook.com	2a01:111:f403:ca04::5 2a01:111:f403:ca04::a 2a01:111:f403:ca04::e 2a01:111:f403:ca09::20 52.101.68.0 52.101.68.3 52.101.68.39 52.101.73.26	mail-db3pr0202cu00205.inbound.protection.outlook.com mail-du0pr03cu00102.inbound.protection.outlook.com mail-db8pr02cu00106.inbound.protection.outlook.com mail-as8pr05cu00400.inbound.protection.outlook.com mail-db3pr0202cu00100.inbound.protection.outlook.com mail-db7pr03cu00403.inbound.protection.outlook.com mail-db7pr03cu00607.inbound.protection.outlook.com mail-as9pr05cu01302.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.101.27.80

🔷 AAAA Records (IPv6)#

2 records 48ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2a06:98c1:3120::1	300s	—	AS13335	Cloudflare, Inc.	2a06:98c1:3120:0:0:0:0:0/46	—	—
2a06:98c1:3121::1	300s	—	AS13335	Cloudflare, Inc.	2a06:98c1:3120:0:0:0:0:0/46	—	—

🔐 HTTPS Records#

1 records 46ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=188.114.96.1,188.114.97.1 ech=AEX+DQBBJAAgACCkYKjF+PgzRLOwW+2yr8astz47Bu7VJ8tl+TZMFjzhSQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2a06:98c1:3120::1,2a06:98c1:3121::1

🔌 SRV Records#

1 records 118ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	0	1	5061	sipfed.online.lync.com

📝 TXT Records#

2 records 246ms

TXT Record
MS=ms39774487
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (s4f.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com -all

📨 DMARC#

Policy	Record (_dmarc.s4f.dk)
p=none (monitor only)	v=DMARC1; p=none; rua=mailto:dmarc@korpskontoret.dk;

📬 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 07:20:23

www	NXDOMAIN
www vs bare domain	www does not resolve s4f.dk: 104.21.86.163 172.67.221.192 2606:4700:3033::ac43:ddc0 2606:4700:3037::6815:56a3 (AS13335) www.s4f.dk: no address (all like this)
Wildcard	No

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector1	selector1-s4f-dk._domainkey.korpskontoret.onmicrosoft.com	RSA · ~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
TXT	_acme-challenge.s4f.dk	FvXeoOUUzlJ59Aiw6Mq1digWP68GSWfnH8j0uZ6R9y0
TXT	_acme-challenge.s4f.dk	rVVs4LhJwrTpZXSRep7n501LVg9durm9T9jNH1NIv6k

🔗 TLSA / DANE#

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

🔐 DNSSEC#

148ms

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	2412712087
Primary NS (MNAME)	lakas.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-21 14:28:31

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2019-06-12
Expires	2027-06-30 (250d)

🔗 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
saf-admin.dk	Punktum dk A/S (direct)
safadm.dk	Punktum dk A/S (direct)
safadmin.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

44ms

36ms

AAAA

48ms

TXT

246ms

CAA

52ms

HTTPS

46ms

TLSA

8157ms

SOA

0ms

MTA-STS

68ms

DNSSEC

148ms

SRV

118ms

Total

17511ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-29 05:13:27	1010ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-26 04:24:13	1039ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-19 19:07:05	1275ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-22 13:08:18	14766ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-21 12:36:36 shown	17511ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-06 22:48:16	2098ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-18 11:02:11	1541ms	2 NS 2 A 1 MX	🔓 Insecure