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. The zone is DNSSEC-signed and validates, 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 | — | — | — | — |
| 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 | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2011070587 |
| 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 (250d) |
| 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 |