undervisningsmodul.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 29 June 2009 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. 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.
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 10800s | mx1.pub.mailpod11-cph3.one.com | 104.37.34.230 | mx1.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx2.pub.mailpod11-cph3.one.com | 104.37.34.231 | mx2.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx3.pub.mailpod11-cph3.one.com | 104.37.34.232 | mx3.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx4.pub.mailpod11-cph3.one.com | 104.37.34.233 | mx4.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves undervisningsmodul.dk: no address www.undervisningsmodul.dk: no address |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| 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 | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2026061304 |
| 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 | ONE.COM A/S |
| Registered | 2009-06-29 |
| Expires | 2027-06-30 (248d) |
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 |
|---|---|---|---|
| 2026-10-24 18:15:40 | 823ms | 2 NS 0 A 4 MX | 🔒 Secure |
| 2026-10-12 16:46:38 | 461ms | 2 NS 0 A 4 MX | 🔒 Secure |
| 2026-10-09 14:30:50 | 856ms | 2 NS 0 A 4 MX | 🔒 Secure |
| 2026-09-30 11:58:04 | 439ms | 2 NS 0 A 4 MX | 🔒 Secure |
| 2026-09-20 19:24:36 | 1675ms | 2 NS 0 A 4 MX | 🔒 Secure |
| 2026-09-07 22:25:33 | 999ms | 2 NS 0 A 4 MX | 🔒 Secure |
| 2026-08-14 14:49:13 | 2396ms | 2 NS 0 A 4 MX | 🔒 Secure |
| 2026-07-10 00:46:46 | 10829ms | 2 NS 0 A 4 MX | 🔒 Secure |
| 2026-06-27 01:12:02 shown | 666ms | 2 NS 0 A 4 MX | 🔒 Secure |
| 2026-06-24 04:53:33 | 1110ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 11:37:31 | 691ms | 2 NS 0 A 4 MX | 🔒 Secure |