3f-a.dk

📜 Historical scan 2026-06-30 21:51:17 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

3f-a.dk is a .dk domain served by 2 nameservers (jay.ns.cloudflare.com, uma.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.40.228 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 51ms

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 44ms

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 36ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3034::ac43:9d90	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3035::6815:28e4	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 39ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.40.228,172.67.157.144 ech=AEX+DQBBJQAgACDCgTrjPLMYreqcHdn4KpOtS4V2QuAW9gylyg3SR56/egAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::ac43:9d90,2606:4700:3035::6815:28e4

📝 TXT Records#

1 records 175ms

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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-10 06:32:46

www	104.21.40.228 172.67.157.144 2606:4700:3030::6815:28e4 2606:4700:3032::ac43:9d90 (AS13335) (address records, no CNAME)
www vs bare domain	Same network 3f-a.dk: 104.21.40.228 172.67.157.144 2606:4700:3030::6815:28e4 2606:4700:3032::ac43:9d90 (AS13335) www.3f-a.dk: 104.21.40.228 172.67.157.144 2606:4700:3030::6815:28e4 2606:4700:3032::ac43:9d90 (AS13335)
Wildcard	Yes: any name under the zone resolves

🔎 SPF check#

zone-wide SPF report

DNS lookups: 0/10 · policy: -all

No problems found

🔏 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)

🔐 DNSSEC#

70ms

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

🏷️ SOA#

48ms

Field	Value
Serial	2405732775
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 yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

51ms

44ms

43ms

AAAA

36ms

TXT

175ms

CAA

41ms

HTTPS

39ms

TLSA

53ms

SOA

48ms

MTA-STS

66ms

DNSSEC

70ms

SRV

67ms

Total

784ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-30 02:29:23	512ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-27 17:39:47	618ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-26 02:51:58	673ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-19 02:11:38	6116ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-01 15:23:17	919ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-30 21:51:17 shown	784ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-20 06:37:20	2361ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-16 12:43:50	550ms	2 NS 2 A 0 MX	🔓 Insecure