kortsystemer.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 9 August 2008 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 81.209.164.94 is hosted by euNetworks GmbH (AS13237) in Germany. Mail is handled by .. The zone is DNSSEC-signed and validates, has no 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 81.209.164.94 | 600s | — | AS13237 | euNetworks GmbH | 81.209.160.0/20 | 🇩🇪 Germany | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 300s | . Null MX — domain accepts no email (RFC 7505) | |||
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | kortsystemer.dk → 81.209.164.94 |
| 🔶 Autoconfig | kortsystemer.dk → 81.209.164.94 |
| www CNAME | kortsystemer.dk (all on kortsystemer.dk) → 81.209.164.94 (AS13237) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.kortsystemer.dk | kortsystemer.dk |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026092901 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2008-08-09 |
| Expires | 2027-08-31 (318d) |
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 |
|---|---|---|---|
| 2026-10-09 10:44:20 shown | 429ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-01 06:43:07 | 594ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 18:57:24 | 715ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-29 18:48:38 | 421ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-24 19:36:51 | 678ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-23 19:04:10 | 2031ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-06 10:10:29 | 895ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-26 11:20:45 | 1145ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-18 06:13:04 | 1017ms | 2 NS 1 A 4 MX | 🔒 Secure |