3f-a.dk DNS records

🖥️ Nameservers2 records 74ms

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 76ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.40.228	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.157.144	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records

📧

No MX records found

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	3f-a.dk → 217.116.234.104
🔶 Autoconfig	3f-a.dk → 217.116.234.104

🔷 AAAA Records (IPv6)2 records 61ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3030::6815:28e4	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3032::ac43:9d90	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records1 records 105ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.40.228,172.67.157.144 ech=AEX+DQBBtwAgACBDcNyPRGjsFrXzLfFcOJ3OxG4EU3aJM0UYC6clTq7CIQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::6815:28e4,2606:4700:3032::ac43:9d90

📝 TXT Records1 records 214ms

TXT Record
v=spf1 -all

✉️ SPF

Policy	Record (3f-a.dk)
-all (hard fail)	v=spf1 -all

📨 DMARC

Policy	Record (_dmarc.3f-a.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

🔏 ACME Challenge

Type	Name	Value
CNAME	_acme-challenge.3f-a.dk	3f-a.dk

🔗 TLSA / DANE

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

🔐 DNSSEC140ms

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	2412541505
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

74ms

A

76ms

MX

60ms

AAAA

61ms

TXT

214ms

CAA

103ms

HTTPS

105ms

TLSA

59ms

SOA

0ms

MTA-STS

114ms

DNSSEC

140ms

SRV

158ms

Total

673ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-26 02:51:58	673ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-08-19 02:11:38	6116ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-08-01 15:23:17	919ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-06-30 21:51:17	784ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-06-20 06:37:20	2361ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-06-16 12:43:50	550ms	2 NS 2 A 0 MX	🔓 Insecure	View