effective-learning.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 16 July 2018 (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 | 104.21.9.175 172.67.161.35 2606:4700:3030::6815:9af 2606:4700:3037::ac43:a123 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network effective-learning.dk: 104.21.9.175 172.67.161.35 2606:4700:3030::6815:9af 2606:4700:3037::ac43:a123 (AS13335) www.effective-learning.dk: 104.21.9.175 172.67.161.35 2606:4700:3030::6815:9af 2606:4700:3037::ac43:a123 (AS13335) |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | Delete signal: the zone asks the registry to remove its DS (go insecure) 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 | Abion AB |
| Registered | 2018-07-16 |
| Expires | 2027-07-31 (285d) |
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).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-15 11:47:30 | 1240ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-03 14:51:06 | 973ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-30 14:46:31 | 954ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-29 14:38:56 shown | 848ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-09-21 17:24:45 | 1286ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-15 01:26:25 | 842ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-07 12:01:25 | 1648ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-28 13:13:57 | 539ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-24 20:03:14 | 2689ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-08 07:22:15 | 788ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-13 05:50:18 | 900ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-24 21:28:51 | 859ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-24 11:42:14 | 761ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-19 23:18:07 | 699ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-17 06:16:05 | 10376ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-17 06:06:03 | 1463ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-17 06:02:57 | 308ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-17 06:00:39 | 389ms | 2 NS 2 A 0 MX | 🔓 Insecure |