trefu.dk

📜 Historical scan 2026-06-17 13:03:56 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

trefu.dk is a .dk domain served by 2 nameservers (jay.ns.cloudflare.com, uma.ns.cloudflare.com). It was registered on 28 January 2008 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.10.32 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 67ms

Nameserver	IP addresses	PTR	ASN / 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 60ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.10.32	—	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.189.225	—	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

📧

No MX records found

🔷 AAAA Records (IPv6)#

2 records 97ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3033::6815:a20	—	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3036::ac43:bde1	—	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 63ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.10.32,172.67.189.225 ech=AEX+DQBBNAAgACDAjIMLMdyoyKrz46qSONFPzN+RU0NXjPG5OscOQ8iLfgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::6815:a20,2606:4700:3036::ac43:bde1

📝 TXT Records#

1 records 151ms

TXT Record
v=spf1 -all

✉️ SPF#

Policy	Record (trefu.dk)
-all (hard fail)	v=spf1 -all

📨 DMARC#

Policy	Record (_dmarc.trefu.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 2026-10-15 19:48:39

www	104.21.10.32 172.67.189.225 2606:4700:3034::6815:a20 2606:4700:3037::ac43:bde1 (AS13335) (address records, no CNAME)
www vs bare domain	Same network trefu.dk: 104.21.10.32 172.67.189.225 2606:4700:3034::6815:a20 2606:4700:3037::ac43:bde1 (AS13335) www.trefu.dk: 104.21.10.32 172.67.189.225 2606:4700:3034::6815:a20 2606:4700:3037::ac43:bde1 (AS13335)
Wildcard	No

🔎 SPF check#

zone-wide SPF report

DNS lookups: 0/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

1445ms

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

🏷️ SOA#

61ms

Field	Value
Serial	2403558802
Primary NS (MNAME)	jay.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-14 19:13:27

Field	Value
Registrar	Simply.com A/S
Registered	2008-01-28
Expires	2027-01-31 (104d)

🔗 Same registrant#

30 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
3-f.dk	Simply.com A/S
3f-a.dk	Simply.com A/S
3f.dk	Simply.com A/S
3fa.dk	Simply.com A/S
3fi.dk	Simply.com A/S
3findustri.dk	Simply.com A/S
3finternational.dk	Simply.com A/S
3frus.dk	Simply.com A/S
3ftransport.dk	CURANET A/S
3ftst.dk	Simply.com A/S
3fudv.dk	Simply.com A/S
3fudvtst.dk	Simply.com A/S
70300300.dk	Simply.com A/S
dagbladet3f.dk	Simply.com A/S
danskemodel.dk	Simply.com A/S
faellesforbundet.dk	Simply.com A/S
fagforeningstjek.dk	Simply.com A/S
fagligtfaellesforbund.dk	Simply.com A/S
fff.dk	Simply.com A/S
fællesskab.dk	Simply.com A/S
landsklubber.dk	Simply.com A/S
langsoehus.dk	Simply.com A/S
lærlinge.dk	Simply.com A/S
nejtilsocialdumping.dk	Simply.com A/S
ok-rent.dk	Simply.com A/S
overenskomster.dk	Simply.com A/S
r-u-s.dk	Simply.com A/S
tib.dk	Simply.com A/S
ungi3f.dk	Simply.com A/S
vaerdigreform.dk	Simply.com A/S

📋 WHOIS#

⏱️ Lookup Timing#

67ms

60ms

64ms

AAAA

97ms

TXT

151ms

CAA

82ms

HTTPS

63ms

TLSA

332ms

SOA

61ms

MTA-STS

219ms

DNSSEC

1445ms

SRV

0ms

Total

3884ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-15 19:48:39	1182ms	2 NS 2 A 0 MX	🔓 Insecure
2026-10-14 18:47:58	384ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-27 00:55:07	2418ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-26 03:39:21	661ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-27 13:52:43	1008ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-26 09:31:08	851ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-16 17:24:48	2076ms	2 NS 2 A 0 MX	🔓 Insecure
2026-07-28 09:55:54	1397ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-21 07:27:21	1012ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-17 13:03:56 shown	3884ms	2 NS 2 A 0 MX	🔓 Insecure