nuk.dk is a .dk domain served by 2 nameservers (udns1.cscdns.net, udns2.cscdns.uk). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 212.51.10.235 is hosted by ADDIX GmbH (AS25415) in Germany. Mail is handled by mx-cluster-c1.one.com, mx-cluster-c2.one.com. The zone is not DNSSEC-signed, has no 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 |
|---|---|---|---|---|---|---|---|
| 212.51.10.235 | 21600s | — | AS25415 | ADDIX GmbH | 212.51.0.0/19 | 🇩🇪 Germany | Kiel |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 86400s | mx-cluster-c1.one.com | — | — | — |
| 10 | 86400s | mx-cluster-c2.one.com | — | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 212.51.10.229 |
| 🔶 Autoconfig | 212.51.10.229 |
| www | 212.51.10.235 (AS25415) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| 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 | 2019111015 |
| Primary NS (MNAME) | udns1.cscdns.net |
| Responsible (RNAME) | premiumdns@support.neustar |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 2592000s |
| Minimum (neg-cache TTL) | 28800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 14:09:41 | 575ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-30 23:55:54 | 741ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-24 10:04:28 | 8664ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-26 05:17:48 shown | 704ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-20 06:03:35 | 902ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-17 13:01:53 | 1882ms | 2 NS 1 A 2 MX | 🔓 Insecure |