guckenheimer.dk

Records from scan: 2026-09-24 02:55:01 · 898ms total · last checked 2026-10-17 17:16 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

guckenheimer.dk is a .dk domain served by 2 nameservers (emily.ns.cloudflare.com, langston.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.4.152 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx10.mailspamprotection.com, mx20.mailspamprotection.com 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 53ms

Nameserver	IP addresses	PTR	ASN / ISP
emily.ns.cloudflare.com	108.162.192.155 172.64.32.155 173.245.58.155 2606:4700:50::adf5:3a9b 2803:f800:50::6ca2:c09b 2a06:98c1:50::ac40:209b	emily.ns.cloudflare.com emily.ns.cloudflare.com emily.ns.cloudflare.com emily.ns.cloudflare.com emily.ns.cloudflare.com emily.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
langston.ns.cloudflare.com	108.162.195.252 162.159.44.252 172.64.35.252 2606:4700:58::a29f:2cfc 2803:f800:50::6ca2:c3fc 2a06:98c1:50::ac40:23fc	langston.ns.cloudflare.com langston.ns.cloudflare.com langston.ns.cloudflare.com langston.ns.cloudflare.com langston.ns.cloudflare.com langston.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
104.21.4.152	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.154.52	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

3 records 42ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	mx10.mailspamprotection.com	34.149.79.66	66.79.149.34.bc.googleusercontent.com	AS396982 Google LLC
20	300s	mx20.mailspamprotection.com	34.120.156.61	61.156.120.34.bc.googleusercontent.com	AS396982 Google LLC
30	300s	mx30.mailspamprotection.com	34.111.121.216	216.121.111.34.bc.googleusercontent.com	AS396982 Google LLC

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	104.21.4.152
🔶 Autoconfig	172.67.154.52

🔷 AAAA Records (IPv6)#

2 records 53ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3034::ac43:9a34	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::6815:498	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 49ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.4.152,172.67.154.52 ech=AEX+DQBB7QAgACCphUGtQ12XRnVjS2suLWMx4ZA8Cz0pWz68xlB3BhgvOgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::ac43:9a34,2606:4700:3037::6815:498

📝 TXT Records#

1 records 215ms

TXT Record
v=spf1 +a +mx +ip4:35.214.209.56 include:_spf.mailspamprotection.com ~all

✉️ SPF#

Policy	Record (guckenheimer.dk)
~all (soft fail)	v=spf1 +a +mx +ip4:35.214.209.56 include:_spf.mailspamprotection.com ~all

📨 DMARC#

Policy	Record (_dmarc.guckenheimer.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:615c1b540a3c443d8bdab50ee6d4b410@dmarc-reports.cloudflare.net

📬 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 2026-10-08 09:40:13

www	104.21.4.152 172.67.154.52 2606:4700:3034::ac43:9a34 2606:4700:3037::6815:498 (AS13335) (address records, no CNAME)
www vs bare domain	Same network guckenheimer.dk: 104.21.4.152 172.67.154.52 2606:4700:3034::ac43:9a34 2606:4700:3037::6815:498 (AS13335) www.guckenheimer.dk: 104.21.4.152 172.67.154.52 2606:4700:3034::ac43:9a34 2606:4700:3037::6815:498 (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: 3/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

93ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2415534562
Primary NS (MNAME)	emily.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#

53ms

40ms

42ms

AAAA

53ms

TXT

215ms

CAA

60ms

HTTPS

49ms

TLSA

250ms

SOA

0ms

MTA-STS

67ms

DNSSEC

93ms

SRV

72ms

Total

898ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-24 02:55:01 shown	898ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-23 23:44:47	684ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-18 17:39:09	1995ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-16 09:42:17	2342ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-09 07:57:49	2545ms	2 NS 2 A 3 MX	🔓 Insecure
2026-08-29 23:10:09	2564ms	2 NS 2 A 3 MX	🔓 Insecure
2026-08-26 22:11:28	1493ms	2 NS 2 A 3 MX	🔓 Insecure
2026-08-20 23:58:06	25296ms	2 NS 2 A 3 MX	🔓 Insecure
2026-08-16 15:58:08	7247ms	2 NS 2 A 3 MX	🔓 Insecure
2026-07-03 13:07:31	3489ms	2 NS 2 A 3 MX	🔓 Insecure
2026-06-25 10:05:27	848ms	2 NS 2 A 3 MX	🔓 Insecure
2026-06-21 09:06:59	2969ms	2 NS 2 A 3 MX	🔓 Insecure
2026-06-19 09:29:29	1056ms	2 NS 2 A 3 MX	🔓 Insecure
2026-06-17 10:00:40	9162ms	2 NS 2 A 3 MX	🔓 Insecure