rstu.dk is a .dk domain with no delegation in this scan. It was registered on 23 January 2022 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. 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.
| www | NXDOMAIN |
| Wildcard | No |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
| Check | Result |
|---|---|
| Validation Status | Not applicable: the domain has no delegation, so there is no zone to validate (stored verdict: ❓ Unknown). |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | resolution failed: failure |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2022-01-23 |
| Expires | 2027-01-22 (111d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-02 18:19:17 | 319ms | 4 NS 0 A 0 MX | 🔒 Secure |
| 2026-09-30 18:08:54 | 338ms | 4 NS 0 A 0 MX | 🔒 Secure |
| 2026-08-27 16:07:12 | 708ms | 4 NS 0 A 0 MX | 🔒 Secure |
| 2026-06-24 21:26:34 | 627ms | 4 NS 0 A 0 MX | 🔒 Secure |
| 2026-06-23 23:06:03 | 1135ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-23 11:20:09 shown | 1181ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-19 03:41:19 | 616ms | 4 NS 0 A 0 MX | ⚠️ Bogus |
| 2026-06-17 13:27:33 | 523ms | 4 NS 0 A 0 MX | 🔒 Secure |