3f.dk DNS records

🖥️ Nameservers2 records 2029ms

Nameserver	IP addresses	PTR	ASN / ISP
lisa.ns.cloudflare.com	—	—	—
max.ns.cloudflare.com	—	—	—

🌍 A Records2 records 2026ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
172.66.40.249	—	—	AS13335	Cloudflare, Inc.	172.66.40.0/21	—	—
172.66.43.7	—	—	AS13335	Cloudflare, Inc.	172.66.40.0/21	—	—

📧 MX Records1 records 2032ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	—	3f-dk.f-v1.mx.microsoft	52.101.73.11 52.101.73.16 52.101.73.26 52.101.73.4	mail-am1pr04cu00103.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-as9pr05cu01302.inbound.protection.outlook.com mail-am0pr83cu00404.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

🔷 AAAA Records (IPv6)2 records 2030ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3108::ac42:28f9	—	—	AS13335	Cloudflare, Inc.	2606:4700:3108::/48	—	—
2606:4700:3108::ac42:2b07	—	—	AS13335	Cloudflare, Inc.	2606:4700:3108::/48	—	—

🔐 HTTPS Records1 records 2031ms

Priority	Target	SvcParams
1 service	.	alpn="h2" ipv4hint=172.66.40.249,172.66.43.7 ipv6hint=2606:4700:3108::ac42:28f9,2606:4700:3108::ac42:2b07

📝 TXT Records10 records 2115ms

TXT Record
_kfi60qo31fwon3pfl52rufqghuku2s4
_nn3od9bbc7n791yym1ek0m8rat2giko
9b57k4tmyw99cxyd647lkst0bb5yl9nt
apple-domain-verification=I7NcqCXHmBPnQvA3
facebook-domain-verification=cx1i1lglcowp198g4bgigvaes4baeo
google-site-verification=H1dyJKnjA-UgTyLq-I0XYAE3oTlg-syy-_vdRs7IbnM
google-site-verification=ZT0IrlPw0Or4SHyagAvP5ye8oJGI4c2PPuDBVrluaAo
mindmanager-verification=79b0e23d95d2d253211befb91a68fa41f6edbf5a8bbe869976831f0fddb0cff4
MS=ms12157205
v=spf1 ip4:52.232.5.115 ip4:77.66.57.123 ip4:168.245.61.203 ip4:168.245.67.108 ip4:193.163.134.0/24 ip4:159.183.35.2 include:spf.protection.outlook.com include:dedicated.mysmtp.com include:spf.mph1.com include:spf.hatteland.com -all

✉️ SPF

Policy	Record (3f.dk)
-all (hard fail)	v=spf1 ip4:52.232.5.115 ip4:77.66.57.123 ip4:168.245.61.203 ip4:168.245.67.108 ip4:193.163.134.0/24 ip4:159.183.35.2 include:spf.protection.outlook.com include:dedicated.mysmtp.com include:spf.mph1.com include:spf.hatteland.com -all

📨 DMARC

Policy	Record (_dmarc.3f.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:7lrymkqp@ag.eu.dmarcian.com; ruf=mailto:7lrymkqp@fr.eu.dmarcian.com;

📬 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 / DANE6 records 95ms

Service / Owner	Type	Cert association
SMTP _25._tcp.3f-dk.f-v1.mx.microsoft	DANE-TA · Full cert · SHA-256	5F88694615E4C61686E106B84C3338C6…
SMTP _25._tcp.3f-dk.f-v1.mx.microsoft	DANE-EE · SPKI · SHA-256	133086C7B822371A4A3304F1661A7880…
SMTP _25._tcp.3f-dk.f-v1.mx.microsoft	DANE-TA · Full cert · SHA-256	38D895F5105BC2545822C17A2444F4B0…
SMTP _25._tcp.3f-dk.f-v1.mx.microsoft	DANE-TA · Full cert · SHA-256	6EBFF927297A5B3AAF5EAE672252C36A…
SMTP _25._tcp.3f-dk.f-v1.mx.microsoft	DANE-EE · SPKI · SHA-256	C495D9E40F7E625BE22F83CC64305182…
SMTP _25._tcp.3f-dk.f-v1.mx.microsoft	DANE-EE · SPKI · SHA-256	A6C267923B26A4A9617EDA73D8DB4FBC…

🔐 DNSSEC2049ms

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

🏷️ SOA2027ms

Field	Value
Serial	2406594954
Primary NS (MNAME)	lisa.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

2029ms

A

2026ms

MX

2032ms

AAAA

2030ms

TXT

2115ms

CAA

2030ms

HTTPS

2031ms

TLSA

95ms

SOA

2027ms

MTA-STS

28ms

DNSSEC

2049ms

SRV

0ms

Total

2952ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-29 14:16:11	1384ms	2 NS 2 A 1 MX	🔒 Secure	View
2026-08-28 05:24:24	1079ms	2 NS 2 A 1 MX	🔒 Secure	View
2026-08-17 21:11:08	4767ms	2 NS 2 A 1 MX	🔒 Secure	View
2026-08-12 17:46:35	5117ms	2 NS 2 A 1 MX	🔒 Secure	View
2026-08-08 03:08:11	1604ms	2 NS 2 A 1 MX	🔒 Secure	View
2026-08-04 05:33:33	1401ms	2 NS 2 A 1 MX	🔒 Secure	View
2026-07-21 04:25:15	1409ms	2 NS 2 A 1 MX	🔒 Secure	View
2026-07-17 20:04:27	2072ms	2 NS 2 A 1 MX	🔒 Secure	View
2026-07-12 06:57:47	1473ms	2 NS 2 A 1 MX	🔒 Secure	View
2026-07-07 03:23:16	1546ms	2 NS 2 A 1 MX	🔒 Secure	View
2026-07-03 06:17:10	1006ms	2 NS 2 A 1 MX	🔒 Secure	View
2026-06-26 08:28:27	774ms	2 NS 2 A 1 MX	🔒 Secure	View
2026-06-20 11:26:01	827ms	2 NS 2 A 1 MX	🔒 Secure	View
2026-06-16 12:47:59	2952ms	2 NS 2 A 1 MX	🔓 Insecure	View