horisonten-stu.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 4 November 2013 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by horisontenstu-dk02e.mail.protection.outlook.com. The zone is not DNSSEC-signed, publishes a 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.
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.179.136 |
| TXT Record |
|---|
| MS=ms32553929 |
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (horisonten-stu.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.horisonten-stu.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:allan@kilden-stu.dk; ruf=mailto:allan@kilden-stu.dk; fo=1 |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves horisonten-stu.dk: no address www.horisonten-stu.dk: no address |
| Wildcard | No |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
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 | ✓ Found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2025040906 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2013-11-04 |
| Expires | 2026-11-30 (33d) |
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 |
|---|---|
| horisonten.dk | Punktum dk A/S (direct) |
| ledestjernenstu.dk | Simply.com A/S |
| satellitterne.dk | Simply.com A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-26 20:48:45 | 669ms | 3 NS 0 A 1 MX | 🔓 Insecure |
| 2026-10-13 08:12:25 | 1189ms | 3 NS 0 A 1 MX | 🔓 Insecure |
| 2026-10-03 16:31:36 | 1185ms | 3 NS 0 A 1 MX | 🔓 Insecure |
| 2026-09-29 16:03:06 | 556ms | 3 NS 0 A 1 MX | 🔓 Insecure |
| 2026-09-25 06:46:10 | 1241ms | 3 NS 0 A 1 MX | 🔓 Insecure |
| 2026-09-20 07:06:00 | 862ms | 3 NS 0 A 1 MX | 🔓 Insecure |
| 2026-08-27 15:50:16 | 786ms | 3 NS 0 A 1 MX | 🔓 Insecure |
| 2026-06-22 07:42:19 shown | 815ms | 3 NS 0 A 1 MX | 🔓 Insecure |
| 2026-06-18 13:02:10 | 717ms | 3 NS 0 A 1 MX | 🔓 Insecure |
| 2026-06-17 13:29:01 | 276ms | 0 NS 0 A 0 MX | ❓ Unknown |