opsys.dk is a .dk domain served by 2 nameservers (primary.ns.hostup.se, secondary.ns.hostup.se). It was registered on 25 March 2010 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. The zone is not DNSSEC-signed, has no 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.
| www | Exists, no address |
| www vs bare domain | Neither resolves opsys.dk: no address www.opsys.dk: no address |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2418252360 |
| Primary NS (MNAME) | primary.ns.hostup.se |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | ODERLAND Webbhotell AB |
| Registered | 2010-03-25 |
| Expires | 2027-03-31 (158d) |
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).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-23 19:44:34 shown | 498ms | 2 NS 0 A 0 MX | 🔓 Insecure |
| 2026-10-20 23:42:44 | 411ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-10-09 10:28:00 | 4406ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-09-30 06:16:44 | 2716ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-09-26 02:04:19 | 3215ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-09-15 09:33:29 | 2838ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-08-27 09:55:17 | 10889ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-08-24 06:27:22 | 2971ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-08-23 06:05:35 | 2026ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-08-22 05:46:56 | 1834ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-08-21 05:15:03 | 17108ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-08-20 04:10:19 | 11801ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-08-19 01:38:34 | 11489ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-08-18 00:36:01 | 8854ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-08-14 09:26:48 | 4981ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-08-12 18:52:12 | 4188ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-08-11 15:04:58 | 5539ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-08-09 22:38:01 | 10995ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-08-07 22:26:50 | 10881ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-08-06 10:57:41 | 1281ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-08-03 16:00:38 | 1131ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-08-01 19:17:10 | 1041ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-30 05:29:36 | 13938ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-27 12:10:41 | 1271ms | 2 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-26 11:48:44 | 996ms | 2 NS 0 A 0 MX | ❓ Unknown |