matematiklaereren.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 6 February 2020 (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 | 93.191.156.43 (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: timed out |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2020-02-06 |
| Expires | 2027-02-28 (132d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-01 15:21:23 | 1676ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-29 15:04:54 | 1798ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-05 08:02:30 | 518ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-06 17:05:54 | 1295ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-28 06:44:35 shown | 10778ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-27 05:16:10 | 2659ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-26 04:51:57 | 741ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-25 04:17:47 | 8591ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-24 03:41:10 | 831ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-23 02:10:00 | 814ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-27 08:08:18 | 1367ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-18 05:16:32 | 649ms | 4 NS 1 A 1 MX | 🔒 Secure |