tref.dk

📜 Historical scan 2026-06-27 15:45:55 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

tref.dk is a .dk domain served by 2 nameservers (lisa.ns.cloudflare.com, max.ns.cloudflare.com). It was registered on 19 July 2011 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.69.103 is hosted by Cloudflare, Inc. (AS13335). The zone is not DNSSEC-signed, has no 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 33ms

Nameserver	IP addresses	PTR	ASN / ISP
lisa.ns.cloudflare.com	108.162.192.131 172.64.32.131 173.245.58.131 2606:4700:50::adf5:3a83 2803:f800:50::6ca2:c083 2a06:98c1:50::ac40:2083	lisa.ns.cloudflare.com lisa.ns.cloudflare.com lisa.ns.cloudflare.com lisa.ns.cloudflare.com lisa.ns.cloudflare.com lisa.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
max.ns.cloudflare.com	108.162.193.132 172.64.33.132 173.245.59.132 2606:4700:58::adf5:3b84 2803:f800:50::6ca2:c184 2a06:98c1:50::ac40:2184	max.ns.cloudflare.com max.ns.cloudflare.com max.ns.cloudflare.com max.ns.cloudflare.com max.ns.cloudflare.com max.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 45ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.69.103	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.207.106	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

📧

No MX records found

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	tref.dk → 185.10.10.80
🔶 Autoconfig	tref.dk → 185.10.10.80

🔷 AAAA Records (IPv6)#

2 records 41ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3030::ac43:cf6a	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3034::6815:4567	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 43ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.69.103,172.67.207.106 ech=AEX+DQBBZQAgACBshTbkGRxYf6K4OGYy9/LzbfsNJcK4d37UNUW/Rh+CFgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::ac43:cf6a,2606:4700:3034::6815:4567

📝 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 2026-10-11 01:29:25

www	185.10.10.80 2001:67c:3c0:12::53 (AS51468) (address records, no CNAME)
www vs bare domain	Different networks tref.dk: 104.21.69.103 172.67.207.106 2606:4700:3030::ac43:cf6a 2606:4700:3034::6815:4567 (AS13335) www.tref.dk: 185.10.10.80 2001:67c:3c0:12::53 (AS51468) (all like this)
Wildcard	Yes: any name under the zone resolves

🔏 ACME Challenge#

Type	Name	Value
CNAME	_acme-challenge.tref.dk	tref.dk

🔗 TLSA / DANE#

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

🔐 DNSSEC#

67ms

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

🏷️ SOA#

41ms

Field	Value
Serial	2405920041
Primary NS (MNAME)	lisa.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-20 15:28:28

Field	Value
Registrar	Simply.com A/S
Registered	2011-07-19
Expires	2027-07-31 (283d)

🔗 Same registrant#

44 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-design.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
3fitst.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
blivijob.dk	Simply.com A/S
dagbladet3f.dk	Simply.com A/S
danskemodel.dk	Simply.com A/S
faellesforbundet.dk	Simply.com A/S
fagbaldet3f.dk	Simply.com A/S
fagbladet.dk	Simply.com A/S
fagforeningstjek.dk	Simply.com A/S
fagligtfaellesforbund.dk	Simply.com A/S
fairpensionsalder.dk	Simply.com A/S
fff.dk	Simply.com A/S
fællesskab.dk	Simply.com A/S
kad.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
sammenomok20.dk	Simply.com A/S
skaevt.dk	Simply.com A/S
skraldemand.dk	Simply.com A/S
skævt.dk	Simply.com A/S
tib.dk	Simply.com A/S
trefu.dk	Simply.com A/S
uddannelsestjek.dk	Simply.com A/S
ungi3f.dk	Simply.com A/S
vaerdigreform.dk	Simply.com A/S
værdigreform.dk	Simply.com A/S

📋 WHOIS#

⏱️ Lookup Timing#

33ms

45ms

37ms

AAAA

41ms

TXT

187ms

CAA

22ms

HTTPS

43ms

TLSA

56ms

SOA

41ms

MTA-STS

45ms

DNSSEC

67ms

SRV

67ms

Total

763ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-29 19:20:13	451ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-27 05:47:41	9444ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-19 07:51:16	1170ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-13 22:45:09	1521ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-28 08:43:26	735ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-06 15:16:48	1685ms	2 NS 2 A 0 MX	🔓 Insecure
2026-07-16 19:05:46	8614ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-27 15:45:55 shown	763ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-17 11:45:47	1047ms	2 NS 2 A 0 MX	🔓 Insecure