categorization.dk is a .dk domain served by 2 nameservers (ns3.au.dk, ns4.au.dk). It was registered on 27 May 2010 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.45.20.48 is hosted by Aarhus Universitet (AS62138) 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns3.au.dk | 20.73.178.34 | ns3.au.dk | AS8075 Microsoft Corporation |
| ns4.au.dk | 185.45.20.154 | ns4.au.dk | AS62138 Aarhus Universitet |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 185.45.20.48 | 900s | — | AS62138 | Aarhus Universitet | 185.45.20.0/22 | 🇩🇰 Denmark | Aarhus |
| TXT Record |
|---|
| v=spf1 include:spf.au.dk -all |
| Policy | Record (categorization.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.au.dk -all |
| Policy | Record (_dmarc.categorization.dk) |
|---|---|
| p=reject | v=DMARC1;p=reject;pct=100;rua=mailto:ced1e70d2c70635@rep.dmarcanalyzer.com;ruf=mailto:ced1e70d2c70635@for.dmarcanalyzer.com;aspf=r; |
| www | 185.45.20.48 (AS62138) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 6/10 · 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 | 2012073979 |
| Primary NS (MNAME) | infobloxgm3.au.dk |
| Responsible (RNAME) | auit-dns@au.dk |
| Refresh | 10800s |
| Retry | 1080s |
| Expire | 2419200s |
| Minimum (neg-cache TTL) | 900s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2010-05-27 |
| Expires | 2027-05-31 (226d) |
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).
Showing 100 of 563.
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-16 11:59:43 | 442ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-14 09:17:06 | 619ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-14 09:02:13 | 808ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-13 07:22:10 | 1225ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-12 06:46:57 | 1718ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-11 04:51:38 | 802ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-10 04:13:49 | 485ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-09 02:02:41 | 1677ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-08 02:01:34 | 1140ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-07 01:44:06 | 1309ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-06 01:13:43 | 391ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-05 01:11:36 | 722ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-04 01:05:22 | 428ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-03 01:04:01 | 710ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-02 01:02:19 | 402ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-01 00:55:12 | 679ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-30 00:44:11 shown | 618ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-29 00:34:42 | 551ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-28 00:17:55 | 764ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-27 00:00:13 | 585ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-25 23:54:13 | 596ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-24 23:39:45 | 555ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-23 23:21:58 | 466ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-18 23:35:30 | 604ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-17 17:52:33 | 554ms | 2 NS 1 A 0 MX | 🔒 Secure |