linuxen.dk is a .dk domain served by 3 nameservers (helium.ns.hetzner.de, hydrogen.ns.hetzner.com, oxygen.ns.hetzner.com). It was registered on 22 March 2021 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 80.240.20.172 is hosted by The Constant Company, LLC (AS20473) in Germany. Mail is handled by mail.linuxen.dk. The zone is not DNSSEC-signed, publishes a DMARC policy and has no IPv6 address. 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 80.240.20.172 | 3600s | 80.240.20.172.vultrusercontent.com | AS20473 | The Constant Company, LLC | 80.240.16.0/20 | 🇩🇪 Germany | Frankfurt am Main |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mail.linuxen.dk | 80.240.20.172 | 80.240.20.172.vultrusercontent.com | AS20473 The Constant Company, LLC |
| TXT Record |
|---|
| v=spf1 a mx ip4:80.240.20.172 ~all |
| Policy | Record (linuxen.dk) |
|---|---|
| ~all (soft fail) | v=spf1 a mx ip4:80.240.20.172 ~all |
| Policy | Record (_dmarc.linuxen.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none |
| www CNAME | linuxen.dk.linuxen.dk (all on linuxen.dk) ⚠ Dangling: the CNAME target does not exist. If that name can be claimed (an unregistered domain, or a free name on a hosting platform), whoever claims it controls www.linuxen.dk |
| www vs bare domain | www does not resolve (all like this) |
| Wildcard | No |
| 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.
DNS lookups: 2/10 · policy: ~all
No problems found| 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 | 2026041400 |
| Primary NS (MNAME) | hydrogen.ns.hetzner.com |
| Responsible (RNAME) | dns@hetzner.com |
| Refresh | 86400s |
| Retry | 10800s |
| Expire | 3600000s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2021-03-22 |
| Expires | 2027-03-31 (157d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-02 16:07:21 | 4280ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-29 21:39:23 shown | 1548ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 23:40:28 | 1842ms | 3 NS 1 A 1 MX | 🔓 Insecure |