hdu.dk is a .dk domain served by 2 nameservers (kate.ns.cloudflare.com, vin.ns.cloudflare.com). It was registered on 6 June 2024 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mx01.mail.icloud.com, mx02.mail.icloud.com. The zone is DNSSEC-signed and validates, publishes a DMARC policy and has no IPv6 address. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| TXT Record |
|---|
| apple-domain=1XnlSU0YvTm4EVhG |
| v=spf1 include:icloud.com ~all |
| Policy | Record (hdu.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:icloud.com ~all |
| Policy | Record (_dmarc.hdu.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; rua=mailto:923878f16f7842a0aadf90f1bf2ad90c@dmarc-reports.cloudflare.net |
| www | Exists, no address |
| www vs bare domain | Neither resolves hdu.dk: no address www.hdu.dk: no address |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 5/10 · policy: ~all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2415801507 |
| Primary NS (MNAME) | kate.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2024-06-06 |
| Expires | 2028-06-05 (593d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-20 19:40:05 shown | 1715ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-10-19 17:51:04 | 631ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-29 22:20:04 | 691ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-26 03:44:58 | 1026ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-25 02:55:31 | 671ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-20 15:21:05 | 1205ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-15 03:11:58 | 1083ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-11 03:05:09 | 3977ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-08 18:06:47 | 2036ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-05 20:54:06 | 906ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-08-31 14:43:57 | 2029ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-08-27 14:21:18 | 945ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-08-26 05:09:40 | 719ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-08-25 03:34:02 | 16839ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-08-08 17:53:14 | 1509ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-07-17 09:44:32 | 9677ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-26 18:18:51 | 1094ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-17 11:10:56 | 1074ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-17 11:08:32 | 1423ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-17 11:02:50 | 1384ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-17 10:57:48 | 2155ms | 2 NS 0 A 2 MX | 🔒 Secure |