masterholmen.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 77.111.240.148 is hosted by One.com A/S (AS51468) in Denmark. Mail is handled by mx1.pub.mailpod6-cph3.one.com, mx2.pub.mailpod6-cph3.one.com and 1 more. 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 77.111.240.148 | 3600s | webcluster21.webpod11-cph3.one.com | AS51468 | One.com A/S | 77.111.240.0/22 | 🇩🇰 Denmark | Copenhagen |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 10800s | mx1.pub.mailpod6-cph3.one.com | 185.164.14.70 | mx1.pub.mailpod6-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx2.pub.mailpod6-cph3.one.com | 185.164.14.71 | mx2.pub.mailpod6-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx3.pub.mailpod6-cph3.one.com | 185.164.14.72 | mx3.pub.mailpod6-cph3.one.com | AS51468 One.com A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 77.111.240.148 |
| 🔶 Autoconfig | 77.111.240.148 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a02:2350:5:102:a4:3343:23ec:d76d | 3600s | — | AS51468 | One.com A/S | 2a02:2350:0:0:0:0:0:0/32 | 🇩🇰 Denmark | Copenhagen |
| www | 77.111.240.135 2a02:2350:5:102:3e:46cd:9c0f:e15d (AS51468) (address records, no CNAME) |
| www vs bare domain | Same network masterholmen.dk: 77.111.240.135 2a02:2350:5:102:3e:46cd:9c0f:e15d (AS51468) www.masterholmen.dk: 77.111.240.135 2a02:2350:5:102:3e:46cd:9c0f:e15d (AS51468) |
| 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.mailpod6-cph3.one.com | DANE-EE · SPKI · SHA-256 | 515D397B5EA735D3D3F24127EB4925FA… |
| SMTP _25._tcp.mx2.pub.mailpod6-cph3.one.com | DANE-EE · SPKI · SHA-256 | 515D397B5EA735D3D3F24127EB4925FA… |
| SMTP _25._tcp.mx3.pub.mailpod6-cph3.one.com | DANE-EE · SPKI · SHA-256 | 515D397B5EA735D3D3F24127EB4925FA… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026062205 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-27 00:49:18 | 584ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-23 23:50:08 | 476ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-26 20:50:13 | 447ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-25 20:28:02 | 617ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-22 00:27:45 | 894ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-27 11:16:33 | 4812ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-30 23:53:49 shown | 628ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-24 17:36:47 | 695ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-20 22:46:30 | 989ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-20 20:15:51 | 1040ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 00:03:28 | 2672ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-17 17:48:41 | 1131ms | 2 NS 1 A 3 MX | 🔒 Secure |