studiekortet.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 28 September 2000 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 82.103.137.56 is hosted by Asergo Holding ApS (AS30736) in Denmark. Mail is handled by studiekortet.dk. The zone is DNSSEC-signed and validates, has no 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 |
|---|---|---|---|---|---|---|---|
| 82.103.137.56 | 43200s | — | AS30736 | Asergo Holding ApS | 82.103.128.0/18 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 43200s | studiekortet.dk | 82.103.137.56 | — | AS30736 Asergo Holding ApS |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | studiekortet.dk → 82.103.137.56 |
| 🔶 Autoconfig | studiekortet.dk → 82.103.137.56 |
| www CNAME | studiekortet.dk (all on studiekortet.dk) → 82.103.137.56 (AS30736) |
| 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.studiekortet.dk | studiekortet.dk |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026092101 |
| 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 | 2000-09-28 |
| Expires | 2027-09-30 (341d) |
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 |
|---|---|---|---|
| 2026-10-20 18:08:29 | 841ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-15 02:03:18 | 467ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-02 13:10:22 | 1637ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-23 11:56:36 shown | 1054ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-27 20:04:50 | 1084ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-03 07:07:52 | 1111ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-27 13:23:03 | 2210ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-19 23:20:25 | 804ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 19:46:36 | 806ms | 2 NS 1 A 1 MX | 🔒 Secure |