matematikborgen.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 26 October 2022 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. The zone is DNSSEC-signed and validates, has no DMARC policy and is reachable over IPv6. 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.
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a02:2350:5:10b:36:ac5e:abef:85e3 | 3600s | — | AS51468 | One.com A/S | 2a02:2350:0:0:0:0:0:0/32 | 🇩🇰 Denmark | Copenhagen |
| www | 46.30.213.119 2a02:2350:5:10b:80bd:4673:85e9:5540 (AS51468) (address records, no CNAME) |
| www vs bare domain | Same network matematikborgen.dk: 46.30.213.119 2a02:2350:5:10b:80bd:4673:85e9:5540 (AS51468) www.matematikborgen.dk: 46.30.213.119 2a02:2350:5:10b:80bd:4673:85e9:5540 (AS51468) |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Registrar | ONE.COM A/S |
| Registered | 2022-10-26 |
| Expires | 2026-10-25 (2d) |
Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).
| Domain | Registrar |
|---|---|
| bogstavrejsen.dk | ONE.COM A/S |
| kreaskyen.dk | ONE.COM A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-21 22:30:44 | 638ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-28 15:23:30 | 816ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-22 06:38:01 | 1550ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-25 03:13:58 | 10544ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-02 21:48:33 | 8012ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-01 18:01:12 | 930ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-30 05:53:44 shown | 13742ms | 2 NS 0 A 0 MX | 🔒 Secure |
| 2026-07-03 00:53:02 | 943ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-27 09:18:05 | 607ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-23 07:12:27 | 1439ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-21 14:52:15 | 1179ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 08:28:09 | 564ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-17 23:33:12 | 744ms | 2 NS 1 A 4 MX | 🔒 Secure |