hf-matematik.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 9 September 2019 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Below are all of its DNS records from our latest 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 | NXDOMAIN |
| Wildcard | No |
| Denial of existence | NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 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 | registry sentinel delegation (no resolvable NS); DNSSEC not evaluated |
| Field | Value |
|---|---|
| Registrar | DANDOMAIN A/S |
| Registered | 2019-09-09 |
| Expires | 2026-09-30 (expired) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-27 04:41:39 shown | 120ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-25 05:52:27 | 97ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-23 22:35:11 | 292ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-22 08:50:08 | 97ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-21 06:32:41 | 224ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-20 05:39:50 | 104ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-19 05:12:20 | 108ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-18 05:07:37 | 453ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-17 04:38:12 | 97ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-16 04:28:05 | 131ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-15 01:54:42 | 138ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-14 01:39:57 | 137ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-12 22:48:10 | 272ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-11 20:42:26 | 100ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-10 20:08:45 | 134ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-09 16:02:44 | 224ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-08 14:15:25 | 623ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-07 14:02:56 | 238ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-06 11:50:28 | 101ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-05 10:14:49 | 130ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-04 10:05:46 | 122ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-03 10:04:31 | 138ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-02 10:02:45 | 792ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-09-24 08:37:25 | 399ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-18 16:33:01 | 576ms | 2 NS 1 A 0 MX | 🔒 Secure |