mailnu.dk is a .dk domain served by 2 nameservers (ns1.mailnu.dk, ns2.mailnu.dk). It was registered on 26 July 2012 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 144.76.30.140 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by mailnu.dk. The zone is not DNSSEC-signed, 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 |
|---|---|---|---|
| ns1.mailnu.dk | 144.76.30.140 | server.mailnu.dk | AS24940 Hetzner Online GmbH |
| ns2.mailnu.dk | 144.76.135.14 | ns2.mailnu.dk | AS24940 Hetzner Online GmbH |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 144.76.30.140 | 14400s | server.mailnu.dk | AS24940 | Hetzner Online GmbH | 144.76.0.0/16 | 🇩🇪 Germany | Falkenstein |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 14400s | mailnu.dk | 144.76.30.140 | server.mailnu.dk | AS24940 Hetzner Online GmbH |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 144.76.30.140 |
| 🔶 Autoconfig | 144.76.30.140 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 0 | 0 | 443 | cpanelemaildiscovery.cpanel.net |
| TXT Record |
|---|
| v=spf1 +a +mx +ip4:144.76.30.140 +ip4:144.76.135.14 +ip6:2a01:4f8:191:218b::2 -all |
| Policy | Record (mailnu.dk) |
|---|---|
| -all (hard fail) | v=spf1 +a +mx +ip4:144.76.30.140 +ip4:144.76.135.14 +ip6:2a01:4f8:191:218b::2 -all |
| www CNAME | mailnu.dk (all on mailnu.dk) → 144.76.30.140 (AS24940) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Selector | CNAME | Key |
|---|---|---|
| default | — | RSA · ~1024 bit below 2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
DNS lookups: 2/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2017031704 |
| Primary NS (MNAME) | ns1.mailnu.dk |
| Responsible (RNAME) | server@webcoders.dk |
| Refresh | 86400s |
| Retry | 7200s |
| Expire | 3600000s |
| Minimum (neg-cache TTL) | 360s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2012-07-26 |
| Expires | 2027-07-31 (286d) |
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 |
|---|---|---|---|
| 2026-09-30 15:14:28 | 662ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-30 03:56:23 | 1187ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-24 02:43:19 | 1088ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-22 08:27:48 | 10150ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-28 07:21:27 | 1196ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-27 08:08:01 | 1547ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-21 17:22:23 shown | 807ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-18 11:29:05 | 7619ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-18 11:23:27 | 702ms | 2 NS 1 A 1 MX | 🔓 Insecure |