duu.dk is a .dk domain served by 4 nameservers (ns01.stil.dk, ns02.stil.dk, ns03.stil.dk and 1 more). It was registered on 6 September 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. We saw it become registrar-handled on 16 October 2026, when it moved from direct registration at Punktum to A/S SCANNET. Its website address 195.231.240.38 is hosted by Styrelsen for it og laering (AS3240) in Denmark. The zone is DNSSEC-signed and validates, 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 195.231.240.38 | 3600s | — | AS3240 | Styrelsen for it og laering | 195.231.224.0/19 | 🇩🇰 Denmark | — |
| TXT Record |
|---|
| v=spf1 include:spf1.stil.dk -all |
| Policy | Record (duu.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf1.stil.dk -all |
| Policy | Record (_dmarc.duu.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; sp=reject; rua=mailto:tcod1eh2@ag.eu.dmarcadvisor.com; |
| www | 195.231.240.38 (AS3240) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 1/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026080601 |
| Primary NS (MNAME) | ns01.stil.dk |
| Responsible (RNAME) | netdrift@stil.dk |
| Refresh | 900s |
| Retry | 300s |
| Expire | 3600000s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | A/S SCANNET |
| Registered | 2017-09-06 |
| Expires | 2027-09-30 (348d) |
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 |
|---|---|---|---|
| 2026-10-16 23:35:40 | 4383ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-08 02:59:49 | 18087ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-04 00:06:27 | 4354ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-01 21:46:45 | 16545ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-30 21:43:54 | 4504ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-27 02:33:38 | 4444ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-24 19:10:05 | 16574ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-23 18:51:44 | 16542ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-11 06:47:55 | 20083ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-11 03:41:29 | 5045ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-03 23:00:47 | 16404ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-28 06:00:05 | 4559ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-27 22:26:28 | 16388ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-21 08:22:32 | 7339ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-20 07:06:50 | 4844ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-13 08:10:01 | 5958ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-08 03:58:34 shown | 5307ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-31 20:16:38 | 4712ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-23 11:15:27 | 13675ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-16 20:57:07 | 4826ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-10 05:40:31 | 4920ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-02 14:33:21 | 4741ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-25 13:53:31 | 4650ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-19 18:32:19 | 8381ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-17 05:05:59 | 4480ms | 4 NS 1 A 0 MX | 🔒 Secure |