ubuntuserver.dk is a .dk domain served by 2 nameservers (anderson.ns.cloudflare.com, harlee.ns.cloudflare.com). It was registered on 18 January 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.64.37 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx1.gigahost.dk, mx2.gigahost.dk and 1 more. 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 104.21.64.37 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.175.233 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mx1.gigahost.dk | 46.183.139.11 | mx1.gigahost.dk | AS47292 Sentia Denmark A/S |
| 10 | 300s | mx2.gigahost.dk | 46.183.139.12 | mx2.gigahost.dk | AS47292 Sentia Denmark A/S |
| 10 | 300s | mx3.gigahost.dk | 46.183.139.13 | mx3.gigahost.dk | AS47292 Sentia Denmark A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 172.67.175.233 |
| 🔶 Autoconfig | 104.21.64.37 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3031::ac43:afe9 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3033::6815:4025 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.64.37,172.67.175.233 ech=AEX+DQBBQgAgACD3RQB8w0HoSL3J2/q8WLxokni7AgtlSAp1RJVIdhxWSQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::ac43:afe9,2606:4700:3033::6815:4025 |
| www | 104.21.64.37 172.67.175.233 2606:4700:3031::ac43:afe9 2606:4700:3033::6815:4025 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network ubuntuserver.dk: 104.21.64.37 172.67.175.233 2606:4700:3031::ac43:afe9 2606:4700:3033::6815:4025 (AS13335) www.ubuntuserver.dk: 104.21.64.37 172.67.175.233 2606:4700:3031::ac43:afe9 2606:4700:3033::6815:4025 (AS13335) |
| Wildcard | Yes: any name under the zone resolves |
| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.ubuntuserver.dk | NiwI5c-gb5DfBreO2hJpQ6oVu87PUuMqVRR20IV4jV0 |
| TXT | _acme-challenge.ubuntuserver.dk | WgUnQ8zNcGTVaxlhwQszVYAMmnY0CYu8Yq6G6MUcBpI |
| 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 | 2415986859 |
| Primary NS (MNAME) | anderson.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2017-01-18 |
| Expires | 2027-05-31 (224d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-28 17:37:23 | 886ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-27 17:29:13 shown | 884ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-23 15:58:44 | 1458ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-20 06:24:13 | 1642ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-27 07:44:20 | 1406ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-25 11:25:58 | 674ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-02 16:04:57 | 945ms | 2 NS 2 A 3 MX | ❓ Unknown |
| 2026-07-22 11:20:46 | 1876ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-06-17 14:18:15 | 1990ms | 2 NS 2 A 3 MX | 🔓 Insecure |