guckenheimer.dk

📜 Historical scan 2026-09-09 07:57:49  ·  ← Latest scan
⬇ 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 this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records   107ms
NameserverIP addressesPTRASN / 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   114ms
IPTTLPTRASNISP / OrgCIDRCountryCity
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   120ms
PriorityTTLMail ServerIP addressesPTRASN
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#

ServiceCNAME / IP
🔷 Autodiscover172.67.154.52
🔶 Autoconfig172.67.154.52

🔷 AAAA Records (IPv6)#

2 records   140ms
IPv6 AddressTTLPTRASNISP / OrgCIDRCountryCity
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   125ms
PriorityTargetSvcParams
1 service . alpn="h3,h2" ipv4hint=104.21.4.152,172.67.154.52 ech=AEX+DQBBbgAgACAZym7BOfz1pzm5ueHCHe541w3QLTwLKOb4lXl/DwvwXQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::ac43:9a34,2606:4700:3037::6815:498

📝 TXT Records#

1 records   288ms
TXT Record
v=spf1 +a +mx +ip4:35.214.209.56 include:_spf.mailspamprotection.com ~all

✉️ SPF#

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

📨 DMARC#

PolicyRecord (_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#

latest probe, not this scan · checked 2026-10-08 09:40:13
www104.21.4.152 172.67.154.52 2606:4700:3034::ac43:9a34 2606:4700:3037::6815:498 (AS13335) (address records, no CNAME)
www vs bare domainSame network
WildcardNo

✍️ DKIM keys#

1 found
SelectorCNAMEKey
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

🔏 ACME Challenge#

TypeNameValue
TXT _acme-challenge.guckenheimer.dk CvxcbjxOl0gCmeVipUDc7CPSiZ0jMUQykMlCHPZyt0M
TXT _acme-challenge.guckenheimer.dk YoKX5OfAbKB3AKMF_d2kFKgQJwuiOISTlhctVqITwRY

🔗 TLSA / DANE#

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

🔐 DNSSEC#

205ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer

🏷️ SOA#

0ms
FieldValue
Serial2414350872
Primary NS (MNAME)emily.ns.cloudflare.com
Responsible (RNAME)dns@cloudflare.com
Refresh10000s
Retry2400s
Expire604800s
Minimum (neg-cache TTL)1800s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup
📋 WHOIS#

⏱️ Lookup Timing#

NS
107ms
A
114ms
MX
120ms
AAAA
140ms
TXT
288ms
CAA
124ms
HTTPS
125ms
TLSA
761ms
SOA
0ms
MTA-STS
145ms
DNSSEC
205ms
SRV
138ms
Total
2545ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-09-24 02:55:01 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 shown 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
dhd.dk [/] search Domains, Hosts & DNS — .dk zone