onlineskolen.dk is a .dk domain served by 3 nameservers (ns.efif.dk, ns2.efif.dk, ns3.efif.dk). It was registered on 9 June 1999 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 195.254.168.193 is hosted by Aarhus Business College (AS51073) in Denmark. The zone is DNSSEC-signed but currently fails validation, 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 |
|---|---|---|---|
| ns.efif.dk | 195.254.168.23 | ns.efif.dk | AS51073 Aarhus Business College |
| ns2.efif.dk | 195.254.168.12 | ns2.efif.dk | AS51073 Aarhus Business College |
| ns3.efif.dk | 20.23.170.35 | — | AS8075 Microsoft Corporation |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 195.254.168.193 | 3600s | — | AS51073 | Aarhus Business College | 195.254.168.0/23 | 🇩🇰 Denmark | Højbjerg |
| TXT Record |
|---|
| @ventures |
| www CNAME | ak-ven-web-02.efif.dk (all on efif.dk) |
| www vs bare domain | www does not resolve (all like this) |
| Wildcard | No |
| Denial of existence | NSEC3 · 50 iterations · 8-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Check | Result |
|---|---|
| Validation Status | ⚠️ Bogus |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | resolution failed: insecurity proof failed |
| Field | Value |
|---|---|
| Serial | 2011070588 |
| Primary NS (MNAME) | ns.efif.dk |
| Responsible (RNAME) | dns-zc@efif.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 2419200s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | Aarhus Business College |
| Registered | 1999-06-09 |
| Expires | 2027-06-30 (249d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-19 18:52:07 | 710ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-16 17:34:17 | 393ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-15 17:29:20 | 4337ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-08 22:42:07 | 748ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-07 22:38:11 | 2681ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-02 19:08:13 | 3069ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-29 18:40:07 | 1136ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-27 18:15:41 | 3939ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-23 17:16:50 | 417ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-17 03:50:24 | 13195ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-17 02:32:01 | 3262ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-12 02:45:39 | 6875ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-05 02:04:13 | 514ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-04 00:45:45 | 446ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-30 16:33:06 | 1950ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-26 22:19:22 | 411ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-24 22:19:30 | 2463ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-18 20:20:27 | 5527ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-12 17:26:04 | 3688ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-09 18:14:01 | 3833ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-08 01:19:28 | 4519ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-01 21:10:03 | 4615ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-26 16:55:07 | 2420ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-24 16:08:52 | 2301ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-21 04:28:12 | 11924ms | 3 NS 1 A 0 MX | 🔒 Secure |