aarhustech.dk is a .dk domain served by 3 nameservers (ns.efif.dk, ns2.efif.dk, ns3.efif.dk). It was registered on 30 April 2009 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. 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 |
| www CNAME | dns.umbraco.io (all on umbraco.io) |
| www vs bare domain | Same network aarhustech.dk: 162.159.140.127 172.66.0.125 (AS13335) www.aarhustech.dk: 162.159.140.127 172.66.0.125 2606:4700:7::7d 2a06:98c1:58::7d (AS13335) |
| 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 |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-aarhustech-dk._domainkey.tstaarhustech.onmicrosoft.com | RSA · ~1024 bit below 2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
| Check | Result |
|---|---|
| Validation Status | ⚠️ Bogus |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✓ Found |
| DNSKEY Record | ✗ Not found |
| Flags | resolution failed: failure |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2009-04-30 |
| Expires | 2027-04-30 (194d) |
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).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-15 01:20:29 | 1311ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-12 22:30:56 | 4575ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-11 20:54:52 | 1293ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-09 08:53:32 | 5323ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-04 06:45:43 | 1050ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-03 06:44:33 | 1039ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-02 06:43:19 shown | 3183ms | 3 NS 0 A 0 MX | ⚠️ Bogus |
| 2026-10-01 06:36:07 | 1152ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-29 06:12:49 | 2310ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-26 04:55:10 | 1173ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-24 05:05:17 | 1117ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-22 15:04:45 | 2658ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-20 11:29:18 | 1596ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-16 04:42:30 | 3663ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-14 23:51:37 | 1205ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-10 01:29:16 | 1626ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-04 11:28:40 | 633ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-26 15:50:32 | 1248ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-22 17:38:08 | 3929ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-19 15:46:31 | 3212ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-15 16:12:55 | 4562ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-09 07:59:50 | 7682ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-07-27 22:51:40 | 10023ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-07-22 19:40:01 | 12011ms | 3 NS 2 A 1 MX | 🔒 Secure |
| 2026-07-20 00:02:22 | 10598ms | 3 NS 2 A 1 MX | 🔒 Secure |