trefu.dk DNS records

🖥️ Nameservers2 records 43ms

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 Records2 records 72ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.10.32	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.189.225	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records

📧

No MX records found

🔷 AAAA Records (IPv6)2 records 65ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3034::6815:a20	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::ac43:bde1	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records1 records 75ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.10.32,172.67.189.225 ech=AEX+DQBBMwAgACAgxhomKHehEW58NJqh4dTyKWEWuazzuXDGTTnRaCl5ZQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::6815:a20,2606:4700:3037::ac43:bde1

📝 TXT Records1 records 279ms

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

🔗 TLSA / DANE

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

🔐 DNSSEC130ms

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

🏷️ SOA0ms

Field	Value
Serial	2412354968
Primary NS (MNAME)	jay.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

43ms

A

72ms

MX

76ms

AAAA

65ms

TXT

279ms

CAA

67ms

HTTPS

75ms

TLSA

156ms

SOA

0ms

MTA-STS

107ms

DNSSEC

130ms

SRV

127ms

Total

1008ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-27 13:52:43	1008ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-08-26 09:31:08	851ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-08-16 17:24:48	2076ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-07-28 09:55:54	1397ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-06-21 07:27:21	1012ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-06-17 13:03:56	3884ms	2 NS 2 A 0 MX	🔓 Insecure	View