sindum.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 6 October 1999 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 176.23.61.194 is hosted by TDC Holding A/S (AS3292) in Denmark. Mail is handled by postfix.netlogon.dk, mail.sindum.dk. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 176.23.61.194 | 600s | 176-23-61-194-cable.dk.customer.tdc.net | AS3292 | TDC Holding A/S | 176.23.0.0/17 | 🇩🇰 Denmark | Copenhagen |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | postfix.netlogon.dk | 95.111.209.178 | 95-111-209-178.se-sto1.upcloud.host | AS202053 UpCloud Ltd |
| 20 | 300s | mail.sindum.dk | 159.65.126.64 | — | AS14061 DigitalOcean, LLC |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| fe80::14c9:49ff:febf:20ee | 600s | — | — | — | — | — | — |
| TXT Record |
|---|
| brevo-code:c7d498ecfd61327f2d5f2d34d21ed8e3 |
| protonmail-verification=fb56faa27d20b37636d23518d281a7baff6eba1e |
| Policy | Record (_dmarc.sindum.dk) |
|---|---|
| no policy tag | v=DMARC1 |
| www | NXDOMAIN |
| www vs bare domain | www does not resolve (all like this) |
| Wildcard | No |
| 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 | 2026092900 |
| Primary NS (MNAME) | hydrogen.ns.hetzner.com |
| Responsible (RNAME) | hostmaster@sindum.dk |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | DANDOMAIN A/S |
| Registered | 1999-10-06 |
| Expires | 2026-12-31 (75d) |
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 |
|---|---|
| adgangsloven.dk | DANDOMAIN A/S |
| lemmus.dk | DANDOMAIN A/S |
| spejderlex.dk | DANDOMAIN A/S |
| trdz.dk | DANDOMAIN A/S |
| turklar.dk | DANDOMAIN A/S |
| udpaturaldrigsur.dk | DANDOMAIN A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 08:53:10 shown | 1016ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-29 08:39:35 | 1104ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-22 18:48:48 | 960ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-16 15:26:46 | 1432ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-04 11:08:05 | 1030ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-26 15:03:16 | 1119ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-29 04:11:06 | 912ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 13:47:49 | 2315ms | 3 NS 1 A 1 MX | 🔓 Insecure |