kctu.dk is a .dk domain served by 3 nameservers (ns.efif.dk, ns2.efif.dk, ns3.efif.dk). It was registered on 7 April 2005 (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 |
| TXT Record |
|---|
| admin.cafs.dk |
| cafs.dk |
| Maskinmesterskolen Kbh |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves kctu.dk: no address www.kctu.dk: no address |
| 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 | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2021030930 |
| 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 | Punktum dk A/S (direct) |
| Registered | 2005-04-07 |
| Expires | 2027-04-30 (187d) |
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 |
|---|---|---|---|
| 2026-10-23 08:41:18 | 453ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-10-20 00:10:56 | 340ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-10-14 17:54:55 | 463ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-10-08 09:40:11 | 673ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-10-06 05:14:24 | 391ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-10-03 04:59:32 | 1428ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-09-28 04:14:11 | 1033ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-09-27 03:58:44 | 1618ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-09-24 02:39:15 | 354ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-09-15 21:17:32 shown | 1380ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-09-07 04:24:13 | 374ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-09-04 05:21:41 | 346ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-08-30 11:09:08 | 391ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-08-25 05:52:16 | 9945ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-08-19 01:23:17 | 2845ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-08-17 05:13:54 | 9607ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-08-14 01:54:19 | 2385ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-08-10 14:45:37 | 4620ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-08-09 13:20:56 | 8565ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-08-08 02:14:06 | 2515ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-08-06 03:14:54 | 523ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-07-26 20:32:59 | 6426ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-07-22 17:43:32 | 13387ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-07-16 02:31:39 | 466ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-07-11 01:28:04 | 538ms | 3 NS 0 A 0 MX | 🔒 Secure |