heydorn.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 30 May 2002 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 5.186.54.20 is hosted by FIBIA P/S (AS44869) in Denmark. Mail is handled by servbyt.heydorn.dk, backup-mx.post.tele.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 |
|---|---|---|---|---|---|---|---|
| 5.186.54.20 | 43200s | 5.186.54.20.static.fibianet.dk | AS44869 | FIBIA P/S | 5.186.0.0/16 | 🇩🇰 Denmark | Lystrup |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 43200s | servbyt.heydorn.dk | 5.186.54.20 | 5.186.54.20.static.fibianet.dk | AS44869 FIBIA P/S |
| 20 | 43200s | backup-mx.post.tele.dk | — | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | heydorn.dk → 5.186.54.20 |
| 🔶 Autoconfig | heydorn.dk → 5.186.54.20 |
| TXT Record |
|---|
| v=spf1 a ptr ip4:5.186.54.20 a:backup-mx.post.tele.dk a:servbyt.heydorn.dk ?all |
| Policy | Record (heydorn.dk) |
|---|---|
| ?all (neutral) | v=spf1 a ptr ip4:5.186.54.20 a:backup-mx.post.tele.dk a:servbyt.heydorn.dk ?all |
| www CNAME | heydorn.dk (all on heydorn.dk) → 5.186.54.20 (AS44869) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 4/10 · policy: ?all
| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.heydorn.dk | heydorn.dk |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026052501 |
| 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 | 2002-05-30 |
| Expires | 2027-06-30 (249d) |
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).
| Domain | Registrar |
|---|---|
| forretningsteknik.dk | Punktum dk A/S (direct) |
| heycon.dk | Punktum dk A/S (direct) |
| katguide.dk | Punktum dk A/S (direct) |
| pleuratech.dk | Punktum dk A/S (direct) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-01 19:50:10 | 946ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-29 19:22:44 | 565ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-25 17:36:47 | 774ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-26 12:56:46 | 728ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-30 02:25:28 | 16788ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-26 21:05:12 | 16644ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-02 06:59:54 | 18014ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-20 17:23:17 shown | 1198ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-17 11:15:10 | 4735ms | 2 NS 1 A 2 MX | 🔒 Secure |