nerdcave.dk is a .dk domain served by 3 nameservers (helium.ns.hetzner.de, hydrogen.ns.hetzner.com, oxygen.ns.hetzner.com). It was registered on 20 October 2021 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 135.181.47.104 is hosted by Hetzner Online GmbH (AS24940) in Finland. Mail is handled by mail2.ruja.dk. The zone is not DNSSEC-signed, publishes a DMARC policy and has no IPv6 address. Below are all of its DNS records from our latest 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 |
|---|---|---|---|---|---|---|---|
| 135.181.47.104 | 3600s | static.104.47.181.135.clients.your-server.de | AS24940 | Hetzner Online GmbH | 135.181.0.0/16 | 🇫🇮 Finland | Helsinki |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mail2.ruja.dk | 2a01:4f9:c010:1473::1 95.216.156.129 |
mail2.ruja.dk mail2.ruja.dk |
AS24940 Hetzner Online GmbH AS24940 Hetzner Online GmbH |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 135.181.47.104 |
| 🔶 Autoconfig | 135.181.47.104 |
| TXT Record |
|---|
| google-site-verification=BQTHuDUy0eiKWkTKgRGxnYocyddacn4wc5FhJi2z67M |
| v=spf1 ip4:95.216.156.129 ip6:2a01:4f9:c010:1473::1/128 mx -all |
| Policy | Record (nerdcave.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:95.216.156.129 ip6:2a01:4f9:c010:1473::1/128 mx -all |
| Policy | Record (_dmarc.nerdcave.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none |
| www | 135.181.47.104 (AS24940) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Selector | CNAME | Key |
|---|---|---|
| dkim | — | RSA · ~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: 1/10 · 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 | 2025120400 |
| Primary NS (MNAME) | hydrogen.ns.hetzner.com |
| Responsible (RNAME) | dns@hetzner.com |
| Refresh | 86400s |
| Retry | 10800s |
| Expire | 3600000s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2021-10-20 |
| Expires | 2027-10-19 (367d) |
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).
| Domain | Registrar |
|---|---|
| 3dbyen.dk | Punktum dk A/S (direct) |
| bruunpetersen.dk | Punktum dk A/S (direct) |
| homonoveller.dk | Punktum dk A/S (direct) |
| nykode.dk | Punktum dk A/S (direct) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-01 03:07:59 shown | 1167ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-25 07:07:03 | 2650ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-29 01:02:52 | 1366ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-24 20:47:52 | 1122ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-22 09:00:26 | 1182ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-18 04:32:37 | 1062ms | 3 NS 1 A 1 MX | 🔓 Insecure |