alumnet.dk is a .dk domain served by 3 nameservers (ns1.sdu.dk, ns2.sdu.dk, ns3.sdu.dk). It was registered on 7 April 2010 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. 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.
| TXT Record |
|---|
| v=spf1 -all |
| Policy | Record (alumnet.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| Policy | Record (_dmarc.alumnet.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; sp=reject; rua=mailto:655b353a1f136@dmarc.centerasecurity.com; ruf=mailto:dmarc.reports@sdu.dk |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves alumnet.dk: no address www.alumnet.dk: no address |
| Wildcard | No |
| Denial of existence | NSEC3 · 10 iterations · 4-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 0/10 · 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 | 2011045838 |
| Primary NS (MNAME) | ns1.sdu.dk |
| Responsible (RNAME) | dns@it-service.sdu.dk |
| Refresh | 3600s |
| Retry | 360s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | dns.services ApS |
| Registered | 2010-04-07 |
| Expires | 2030-04-30 (1288d) |
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 |
|---|---|---|---|
| 2026-10-19 06:02:41 | 16432ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-10-14 02:27:24 | 16553ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-10-13 00:26:42 | 16375ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-10-11 23:11:25 | 16902ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-10-05 07:27:10 | 16785ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-10-04 06:57:57 | 4298ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-09-28 06:16:50 | 16426ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-09-26 05:52:07 | 16514ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-09-24 05:01:05 | 4333ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-09-21 14:09:29 | 6812ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-09-14 11:42:41 | 16432ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-09-09 16:52:43 | 16454ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-09-03 19:51:41 | 16539ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-08-27 12:38:51 | 7297ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-08-27 03:03:48 | 4475ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-08-27 00:00:31 | 16334ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-08-25 16:54:44 | 16532ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-08-24 14:01:16 | 4718ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-08-19 03:44:58 | 16517ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-08-11 06:08:14 shown | 5640ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-08-08 10:07:30 | 6848ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-07-27 05:51:47 | 4434ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-07-26 05:33:41 | 8544ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-07-25 05:09:13 | 615ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-07-20 14:06:42 | 6634ms | 3 NS 0 A 0 MX | 🔒 Secure |