a-u.dk is a .dk domain served by 3 nameservers (ns1.dns.services, ns2.dns.services, ns3.dns.services). It was registered on 5 January 1999 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 94.231.97.209 is hosted by team.blue Denmark A/S (AS48854) 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 |
|---|---|---|---|---|---|---|---|
| 94.231.97.209 | 3600s | nginx1.relationhouse.dk | AS48854 | team.blue Denmark A/S | 94.231.96.0/20 | 🇩🇰 Denmark | — |
| TXT Record |
|---|
| v=spf1 ip4:45.65.89.65 include:spf-esec.heimdalsecurity.com -all |
| Policy | Record (a-u.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:45.65.89.65 include:spf-esec.heimdalsecurity.com -all |
| Policy | Record (_dmarc.a-u.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:6082a74ca9e59@dmarc.centerasecurity.com; |
| www CNAME | a-u.dk (all on a-u.dk) → 94.231.97.209 (AS48854) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 0 CDS, 1 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 | 2026082701 |
| Primary NS (MNAME) | ns1.dns.services |
| Responsible (RNAME) | hostmaster@a-u.dk |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 1999-01-05 |
| Expires | 2027-03-31 (165d) |
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 01:01:45 | 568ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-15 23:47:36 | 676ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-08 06:40:19 | 1167ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-01 05:19:23 | 532ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-30 05:07:09 | 350ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-25 03:36:01 | 2306ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-24 23:34:49 | 450ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-20 12:10:22 | 396ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-18 21:50:29 | 868ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-11 19:37:23 | 721ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-03 17:04:33 | 402ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-28 00:46:43 | 634ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-27 22:14:50 shown | 337ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-20 12:40:26 | 5136ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-15 16:18:02 | 1360ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-10 14:28:09 | 8759ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-02 05:02:36 | 1624ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-24 00:03:23 | 925ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-17 13:32:18 | 718ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-10 16:58:10 | 798ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-03 15:32:07 | 492ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-25 05:09:45 | 746ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-18 09:31:15 | 877ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-16 13:15:06 | 414ms | 3 NS 1 A 0 MX | 🔒 Secure |