3-f.dk

📜 Historical scan 2026-09-28 23:29:36  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

3-f.dk is a .dk domain served by 2 nameservers (jay.ns.cloudflare.com, uma.ns.cloudflare.com). It was registered on 4 October 2016 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.54.82 is hosted by Cloudflare, Inc. (AS13335). 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   32ms
NameserverIP addressesPTRASN / ISP
jay.ns.cloudflare.com 108.162.193.123
172.64.33.123
173.245.59.123
2606:4700:58::adf5:3b7b
2803:f800:50::6ca2:c17b
2a06:98c1:50::ac40:217b		 jay.ns.cloudflare.com
jay.ns.cloudflare.com
jay.ns.cloudflare.com
jay.ns.cloudflare.com
jay.ns.cloudflare.com
jay.ns.cloudflare.com		 AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
uma.ns.cloudflare.com 108.162.192.146
172.64.32.146
173.245.58.146
2606:4700:50::adf5:3a92
2803:f800:50::6ca2:c092
2a06:98c1:50::ac40:2092		 uma.ns.cloudflare.com
uma.ns.cloudflare.com
uma.ns.cloudflare.com
uma.ns.cloudflare.com
uma.ns.cloudflare.com
uma.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   36ms
IPTTLPTRASNISP / OrgCIDRCountryCity
104.21.54.82 300s — AS13335 Cloudflare, Inc. 104.21.0.0/17 — —
172.67.136.200 300s — AS13335 Cloudflare, Inc. 172.67.128.0/17 — —

📧 MX Records#

📧
No MX records found

🔷 AAAA Records (IPv6)#

2 records   39ms
IPv6 AddressTTLPTRASNISP / OrgCIDRCountryCity
2606:4700:3034::6815:3652 300s — AS13335 Cloudflare, Inc. 2606:4700:3000:0:0:0:0:0/42 — —
2606:4700:3035::ac43:88c8 300s — AS13335 Cloudflare, Inc. 2606:4700:3000:0:0:0:0:0/42 — —

🔐 HTTPS Records#

1 records   53ms
PriorityTargetSvcParams
1 service . alpn="h3,h2" ipv4hint=104.21.54.82,172.67.136.200 ech=AEX+DQBB7QAgACAB/s5wDktZzfurFSNLXVXsBbadZH/7182blkILBW1nRQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::6815:3652,2606:4700:3035::ac43:88c8

📝 TXT Records#

1 records   175ms
TXT Record
v=spf1 -all

✉️ SPF#

PolicyRecord (3-f.dk)
-all (hard fail) v=spf1 -all

📨 DMARC#

PolicyRecord (_dmarc.3-f.dk)
p=reject v=DMARC1; p=reject; sp=reject; adkim=s; aspf=s;

📬 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 2026-10-08 02:24:47
www104.21.54.82 172.67.136.200 2606:4700:3034::6815:3652 2606:4700:3035::ac43:88c8 (AS13335) (address records, no CNAME)
www vs bare domainSame network
WildcardNo

🔎 SPF check#

zone-wide SPF report

DNS lookups: 0/10 · policy: -all

No problems found

🔏 ACME Challenge#

TypeNameValue
TXT _acme-challenge.3-f.dk _h6I-K3Q5XJKpVFid4kZUuGymHUrPw5TBnl3PCq2_QE
TXT _acme-challenge.3-f.dk oGoThXIfMiRt5f8ruEpYWMxJpuZ-rzQ71_mXEohLXg0

🔗 TLSA / DANE#

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

🔐 DNSSEC#

118ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer

🏷️ SOA#

0ms
FieldValue
Serial2416116426
Primary NS (MNAME)jay.ns.cloudflare.com
Responsible (RNAME)dns@cloudflare.com
Refresh10000s
Retry2400s
Expire604800s
Minimum (neg-cache TTL)1800s

📋 Registration#

WHOIS fetched 2026-10-16 03:08:09
FieldValue
RegistrarSimply.com A/S
Registered2016-10-04
Expires2028-10-31 (738d)

🔗 Same registrant#

51 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).

DomainRegistrar
3f-a.dkSimply.com A/S
3f-design.dkSimply.com A/S
3f.dkSimply.com A/S
3fa.dkSimply.com A/S
3fi.dkSimply.com A/S
3findustri.dkSimply.com A/S
3finternational.dkSimply.com A/S
3fitst.dkSimply.com A/S
3fkongres.dkSimply.com A/S
3frus.dkSimply.com A/S
3ftransport.dkCURANET A/S
3ftst.dkSimply.com A/S
3fudv.dkSimply.com A/S
3fudvtst.dkSimply.com A/S
70300300.dkSimply.com A/S
blivijob.dkSimply.com A/S
dagbladet3f.dkSimply.com A/S
danskemodel.dkSimply.com A/S
faellesforbundet.dkSimply.com A/S
fagbaldet3f.dkSimply.com A/S
fagbladet.dkSimply.com A/S
fagbladet3f.dkSimply.com A/S
fagforeningstjek.dkSimply.com A/S
fagligtfaellesforbund.dkSimply.com A/S
fairpensionsalder.dkSimply.com A/S
fff.dkSimply.com A/S
fællesskab.dkSimply.com A/S
kad.dkSimply.com A/S
landsklubber.dkSimply.com A/S
langsoehus.dkSimply.com A/S
langsohus.dkSimply.com A/S
langsøhus.dkSimply.com A/S
lærlinge.dkSimply.com A/S
nejtilsocialdumping.dkSimply.com A/S
ok-rent.dkSimply.com A/S
overenskomster.dkSimply.com A/S
r-u-s.dkSimply.com A/S
rus3f.dkSimply.com A/S
sammenomok20.dkSimply.com A/S
skaevt.dkSimply.com A/S
skraldemand.dkSimply.com A/S
skævt.dkSimply.com A/S
stopsocialdumping.dkSimply.com A/S
tib.dkSimply.com A/S
tillid.dkSimply.com A/S
tref.dkSimply.com A/S
trefu.dkSimply.com A/S
uddannelsestjek.dkSimply.com A/S
ungi3f.dkSimply.com A/S
vaerdigreform.dkSimply.com A/S
værdigreform.dkSimply.com A/S
📋 WHOIS#

⏱️ Lookup Timing#

NS
32ms
A
36ms
MX
39ms
AAAA
39ms
TXT
175ms
CAA
32ms
HTTPS
53ms
TLSA
49ms
SOA
0ms
MTA-STS
54ms
DNSSEC
118ms
SRV
58ms
Total
1165ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-03 23:55:15 402ms 2 NS 2 A 0 MX 🔓 Insecure
2026-09-29 23:34:09 670ms 2 NS 2 A 0 MX 🔓 Insecure
2026-09-28 23:29:36 shown 1165ms 2 NS 2 A 0 MX 🔓 Insecure
2026-09-05 03:06:53 513ms 2 NS 2 A 0 MX 🔓 Insecure
2026-08-26 21:49:25 9523ms 2 NS 2 A 0 MX 🔓 Insecure
2026-08-06 10:10:12 1412ms 2 NS 2 A 0 MX 🔓 Insecure
2026-06-29 15:18:16 858ms 2 NS 2 A 0 MX 🔓 Insecure
2026-06-25 11:28:18 2017ms 2 NS 2 A 0 MX 🔓 Insecure
2026-06-16 13:00:46 607ms 2 NS 2 A 0 MX 🔓 Insecure
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