carlsbook.dk is a .dk domain served by 2 nameservers (ns01.brandshelter.com, ns02.brandshelter.net). It was registered on 23 August 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.123.52.199 is hosted by froxlor GmbH (AS207048) in Germany. Mail is handled by mxa.eu.mailgun.org, mxb.eu.mailgun.org. The zone is not DNSSEC-signed, has no 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns01.brandshelter.com | 193.227.117.15 2a04:2b00:14cc::15 |
— — |
AS1921 ipcom GmbH AS1921 ipcom GmbH |
| ns02.brandshelter.net | 194.50.187.16 2a04:2b00:14dd::16 |
— ns16.j.centralnic-dns.com |
AS207021 ipcom GmbH AS1921 ipcom GmbH |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 185.123.52.199 | 300s | sslfwd.questeldomains.com | AS207048 | froxlor GmbH | 185.123.52.0/24 | 🇩🇪 Germany | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mxa.eu.mailgun.org | 34.111.130.244 | 244.130.111.34.bc.googleusercontent.com | AS396982 Google LLC |
| 10 | 300s | mxb.eu.mailgun.org | 34.111.130.244 | 244.130.111.34.bc.googleusercontent.com | AS396982 Google LLC |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a10:ec6:1:3:185:123:52:199 | 300s | sslfwd.questeldomains.com | AS207048 | froxlor GmbH | 2a10:ec0:0:0:0:0:0:0/29 | 🇩🇪 Germany | — |
| TXT Record |
|---|
| 4q0wwh1gh3m332jsgjsbd9nrl6tn1nty |
| ca3-07f1f09e75cd4ef78d4f8c5eca7f978a |
| rg-ww-prod-mlk-carlsbook-webapp01.azurewebsites.net |
| v=spf1 include:mailgun.org ~all |
| Policy | Record (carlsbook.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:mailgun.org ~all |
| www | Exists, no address |
| www vs bare domain | www does not resolve (all like this) |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| s1 | — | 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.
DNS lookups: 5/10 · policy: ~all
No problems found| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.carlsbook.dk | carlsbook.dk.2e5c1df0eec0e5b2.dcv.cloudflare.com |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2026062400 |
| Primary NS (MNAME) | ns01.brandshelter.com |
| Responsible (RNAME) | tech@brandshelter.com |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 300s |
| Field | Value |
|---|---|
| Registrar | Key-Systems GmbH |
| Registered | 2017-08-23 |
| Expires | 2027-08-31 (318d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 03:08:16 | 764ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-01 02:39:09 | 908ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-28 07:56:55 shown | 3083ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-27 15:07:16 | 2038ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-19 21:50:10 | 685ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-16 19:38:19 | 28320ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-16 19:25:23 | 588ms | 2 NS 1 A 2 MX | 🔓 Insecure |