collaboration.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 5 September 2003 (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 | Address record (no CNAME) |
| 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 | registry sentinel delegation (no resolvable NS); DNSSEC not evaluated |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2003-09-05 |
| Expires | 2026-09-30 (expired) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-23 07:57:35 shown | 108ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-21 07:28:37 | 110ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-20 04:58:24 | 100ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-19 04:35:56 | 138ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-18 04:22:13 | 219ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-17 04:09:28 | 240ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-16 02:44:44 | 99ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-15 02:00:38 | 242ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-14 01:36:47 | 220ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-12 18:19:15 | 303ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-11 17:32:27 | 238ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-10 16:36:13 | 238ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-09 12:45:37 | 1111ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-08 11:14:27 | 736ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-07 11:02:34 | 230ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-06 09:47:59 | 206ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-05 09:13:52 | 253ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-04 09:05:21 | 218ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-03 09:03:17 | 303ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-02 09:01:44 | 850ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-01 08:55:41 | 728ms | 3 NS 1 A 5 MX | 🔒 Secure |
| 2026-09-30 08:52:41 | 682ms | 3 NS 1 A 5 MX | 🔒 Secure |
| 2026-09-11 14:13:35 | 669ms | 3 NS 1 A 5 MX | 🔒 Secure |
| 2026-07-01 23:30:31 | 2123ms | 3 NS 1 A 5 MX | 🔒 Secure |
| 2026-06-16 21:46:01 | 650ms | 3 NS 1 A 5 MX | 🔒 Secure |