b4u.dk

Records from scan: 2026-09-30 02:36:43 · 1234ms total · last checked 2026-10-17 07:37 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

b4u.dk is a .dk domain served by 2 nameservers (odin.ns.cloudflare.com, olga.ns.cloudflare.com). It was registered on 22 December 2024 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.25.24 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by smtp.b4u.dk, mail1.b4u.dk and 2 more. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 43ms

Nameserver	IP addresses	PTR	ASN / ISP
odin.ns.cloudflare.com	108.162.195.208 162.159.44.208 172.64.35.208 2606:4700:58::a29f:2cd0 2803:f800:50::6ca2:c3d0 2a06:98c1:50::ac40:23d0	odin.ns.cloudflare.com odin.ns.cloudflare.com odin.ns.cloudflare.com odin.ns.cloudflare.com odin.ns.cloudflare.com odin.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
olga.ns.cloudflare.com	108.162.192.137 172.64.32.137 173.245.58.137 2606:4700:50::adf5:3a89 2803:f800:50::6ca2:c089 2a06:98c1:50::ac40:2089	olga.ns.cloudflare.com olga.ns.cloudflare.com olga.ns.cloudflare.com olga.ns.cloudflare.com olga.ns.cloudflare.com olga.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 40ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.25.24	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.222.10	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

4 records 46ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	smtp.b4u.dk	62.164.213.156	vmi2345123.contaboserver.net	AS51167 Contabo GmbH
20	300s	mail1.b4u.dk	144.91.107.31	vmi2946224.contaboserver.net	AS51167 Contabo GmbH
40	300s	mxa.eu.mailgun.org	34.111.130.244	244.130.111.34.bc.googleusercontent.com	AS396982 Google LLC
50	300s	mxb.eu.mailgun.org	34.111.130.244	244.130.111.34.bc.googleusercontent.com	AS396982 Google LLC

🔷 AAAA Records (IPv6)#

2 records 44ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3033::ac43:de0a	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3035::6815:1918	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 41ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.25.24,172.67.222.10 ech=AEX+DQBBhAAgACDJjiE+J3zG2l6F8wFAVlOI1gujZiCc42Cp8BAKeaoBHgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::ac43:de0a,2606:4700:3035::6815:1918

📝 TXT Records#

1 records 166ms

TXT Record
v=spf1 +mx +a include:mailgun.org ~all

✉️ SPF#

Policy	Record (b4u.dk)
~all (soft fail)	v=spf1 +mx +a include:mailgun.org ~all

📨 DMARC#

Policy	Record (_dmarc.b4u.dk)
p=quarantine	v=DMARC1;p=quarantine;rua=mailto:admin@b4u.dk;

📬 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#

checked 2026-10-09 08:50:16

www	104.21.25.24 172.67.222.10 2606:4700:3033::ac43:de0a 2606:4700:3035::6815:1918 (AS13335) (address records, no CNAME)
www vs bare domain	Same network b4u.dk: 104.21.25.24 172.67.222.10 2606:4700:3033::ac43:de0a 2606:4700:3035::6815:1918 (AS13335) www.b4u.dk: 104.21.25.24 172.67.222.10 2606:4700:3033::ac43:de0a 2606:4700:3035::6815:1918 (AS13335)
Wildcard	No

✍️ DKIM keys#

1 found

Selector	CNAME	Key
default	—	RSA · ~1024 bit below 2048 bit

DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 7/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

111ms

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

🏷️ SOA#

31ms

Field	Value
Serial	2416205343
Primary NS (MNAME)	odin.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-15 11:20:25

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2024-12-22
Expires	2026-12-21 (64d)

🔗 Same registrant#

1 domain

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
baagøeperformance.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

43ms

40ms

46ms

AAAA

44ms

TXT

166ms

CAA

39ms

HTTPS

41ms

TLSA

141ms

SOA

31ms

MTA-STS

58ms

DNSSEC

111ms

SRV

64ms

Total

1234ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-30 02:36:43 shown	1234ms	2 NS 2 A 4 MX	🔓 Insecure
2026-09-28 01:58:42	9862ms	2 NS 2 A 4 MX	🔓 Insecure
2026-09-17 12:39:55	1273ms	2 NS 2 A 4 MX	🔓 Insecure
2026-09-07 00:31:12	2353ms	2 NS 2 A 4 MX	🔓 Insecure
2026-08-29 21:07:09	761ms	2 NS 2 A 4 MX	🔓 Insecure
2026-08-07 04:13:04	2051ms	2 NS 2 A 4 MX	🔓 Insecure
2026-07-18 13:11:17	1632ms	2 NS 2 A 4 MX	❓ Unknown
2026-07-03 18:49:28	1356ms	2 NS 2 A 4 MX	🔓 Insecure
2026-07-02 11:46:08	5469ms	2 NS 2 A 4 MX	🔓 Insecure
2026-06-25 07:44:23	1405ms	2 NS 2 A 4 MX	🔓 Insecure
2026-06-21 11:20:37	880ms	2 NS 2 A 4 MX	🔓 Insecure
2026-06-16 13:57:35	2737ms	2 NS 2 A 4 MX	🔓 Insecure