dueoptics.dk is a .dk domain the registry has taken out of service: it is delegated to the registry's own sentinel nameservers (nonexistent.punktum.dk), so it does not resolve. It was registered on 4 May 2014 (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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| nonexistent.punktum.dk | — | — | — |
| www | 94.231.103.138 (AS48854) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| 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 | ❓ Unknown (the delegated nameservers don't answer) |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | resolution failed: failure |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2014-05-04 |
| Expires | 2027-05-31 (225d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-01 05:36:20 | 1282ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-24 03:50:57 | 493ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-14 11:15:53 | 741ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-07 09:17:16 shown | 935ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-08-28 01:12:35 | 585ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-25 19:02:43 | 567ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-29 12:12:52 | 616ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-26 19:34:37 | 484ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-23 10:50:26 | 910ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-22 15:23:59 | 671ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-21 04:46:30 | 1985ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 04:55:50 | 507ms | 4 NS 1 A 1 MX | 🔒 Secure |