4d-academy.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 14 November 2011 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 195.184.33.122 is hosted by TDC Holding A/S (AS3292) in Denmark. Mail is handled by mx1.pub.mailpod11-cph3.one.com, mx2.pub.mailpod11-cph3.one.com and 2 more. The zone is DNSSEC-signed and validates, has no DMARC policy and has no IPv6 address. 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 |
|---|---|---|---|
| ns01.one.com | — | — | — |
| ns02.one.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 195.184.33.122 | — | — | AS3292 | TDC Holding A/S | 195.184.32.0/19 | 🇩🇰 Denmark | — |
| www | 195.184.33.122 (AS3292) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 00E55642F312E05CDB899B1433EDF47F… |
| SMTP _25._tcp.mx2.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 00E55642F312E05CDB899B1433EDF47F… |
| SMTP _25._tcp.mx3.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 00E55642F312E05CDB899B1433EDF47F… |
| SMTP _25._tcp.mx4.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 00E55642F312E05CDB899B1433EDF47F… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026032401 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2011-11-14 |
| Expires | 2026-11-30 (39d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-10 20:44:48 | 562ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-05 06:38:24 | 563ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-26 04:43:03 | 643ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-23 12:26:58 | 680ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-31 18:52:02 | 9736ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-16 14:51:04 | 1062ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-27 02:44:51 | 4856ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-13 17:44:38 | 4859ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-20 05:25:33 | 677ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-16 12:55:57 shown | 1672ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-16 12:53:45 | 1729ms | 2 NS 1 A 4 MX | 🔒 Secure |