rosenbrock.dk

Records from scan: 2026-10-02 22:31:35 · 3152ms total · last checked 2026-10-16 18:59 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

rosenbrock.dk is a .dk domain served by 2 nameservers (aiden.ns.cloudflare.com, sofia.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.66.124 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx1-hosting.jellyfish.systems, mx2-hosting.jellyfish.systems and 1 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 47ms

Nameserver	IP addresses	PTR	ASN / ISP
aiden.ns.cloudflare.com	108.162.193.55 172.64.33.55 173.245.59.55 2606:4700:58::adf5:3b37 2803:f800:50::6ca2:c137 2a06:98c1:50::ac40:2137	aiden.ns.cloudflare.com aiden.ns.cloudflare.com aiden.ns.cloudflare.com aiden.ns.cloudflare.com aiden.ns.cloudflare.com aiden.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
sofia.ns.cloudflare.com	108.162.192.223 172.64.32.223 173.245.58.223 2606:4700:50::adf5:3adf 2803:f800:50::6ca2:c0df 2a06:98c1:50::ac40:20df	sofia.ns.cloudflare.com sofia.ns.cloudflare.com sofia.ns.cloudflare.com sofia.ns.cloudflare.com sofia.ns.cloudflare.com sofia.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 28ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.66.124	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.159.232	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

3 records 39ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
5	300s	mx1-hosting.jellyfish.systems	162.255.118.28	oxse3a.privateemail.com	AS22612 Namecheap, Inc.
10	300s	mx2-hosting.jellyfish.systems	162.255.118.29	oxse2b.privateemail.com	AS22612 Namecheap, Inc.
20	300s	mx3-hosting.jellyfish.systems	162.255.118.13	mx3-hosting.jellyfish.systems	AS22612 Namecheap, Inc.

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	172.67.159.232
🔶 Autoconfig	104.21.66.124

🔷 AAAA Records (IPv6)#

2 records 31ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3034::6815:427c	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3035::ac43:9fe8	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 30ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.66.124,172.67.159.232 ech=AEX+DQBBdgAgACDArvUAQgkn5Am9lx7BsX0BUDXVBQC0RmfQAI531D/UNQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::6815:427c,2606:4700:3035::ac43:9fe8

🔌 SRV Records#

1 records 76ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	0	0	443	cpanelemaildiscovery.cpanel.net

📝 TXT Records#

1 records 186ms

TXT Record
v=spf1 +a +mx +ip4:192.64.117.175 +ip4:192.64.117.186 include:spf.web-hosting.com ~all

✉️ SPF#

Policy	Record (rosenbrock.dk)
~all (soft fail)	v=spf1 +a +mx +ip4:192.64.117.175 +ip4:192.64.117.186 include:spf.web-hosting.com ~all

📨 DMARC#

Policy	Record (_dmarc.rosenbrock.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:dmarc@rosenbrock.dk; ruf=mailto:faileddmarc@rosenbrock.dk; rf=afrf; fo=0:1:d:s; pct=100; ri=42320; 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#

checked 2026-10-09 02:10:46

www	104.21.66.124 172.67.159.232 2606:4700:3034::6815:427c 2606:4700:3035::ac43:9fe8 (AS13335) (address records, no CNAME)
www vs bare domain	Same network rosenbrock.dk: 104.21.66.124 172.67.159.232 2606:4700:3034::6815:427c 2606:4700:3035::ac43:9fe8 (AS13335) www.rosenbrock.dk: 104.21.66.124 172.67.159.232 2606:4700:3034::6815:427c 2606:4700:3035::ac43:9fe8 (AS13335)
Wildcard	No

✍️ DKIM keys#

1 found

Selector	CNAME	Key
default	—	RSA · ~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: 9/10 · policy: ~all

warn 9 of the 10 allowed DNS lookups used: one more include can break SPF

🔗 TLSA / DANE#

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

🔐 DNSSEC#

75ms

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

🏷️ SOA#

65ms

Field	Value
Serial	2416456752
Primary NS (MNAME)	aiden.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#

47ms

28ms

39ms

AAAA

31ms

TXT

186ms

CAA

42ms

HTTPS

30ms

TLSA

2365ms

SOA

65ms

MTA-STS

62ms

DNSSEC

75ms

SRV

76ms

Total

3152ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-02 22:31:35 shown	3152ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-29 22:18:11	615ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-25 12:58:48	3078ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-24 00:26:55	705ms	2 NS 2 A 3 MX	🔓 Insecure
2026-08-06 05:13:12	2083ms	2 NS 2 A 3 MX	🔓 Insecure
2026-07-19 11:21:14	9593ms	2 NS 2 A 3 MX	🔓 Insecure
2026-07-01 00:51:37	1344ms	2 NS 2 A 3 MX	🔓 Insecure
2026-06-27 15:43:18	2307ms	2 NS 2 A 3 MX	🔓 Insecure
2026-06-17 22:33:25	1332ms	2 NS 2 A 3 MX	🔓 Insecure