holdfast.dk is a .dk domain served by 2 nameservers (ns-auth03.kmd.dk, ns-auth04.kmd.dk). It was registered on 7 September 2004 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 131.165.111.156 is hosted by KMD A/S (AS6834) in Denmark. Mail is handled by .. The zone is not DNSSEC-signed, 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 |
|---|---|---|---|
| ns-auth03.kmd.dk | 131.165.64.5 | ns-auth03.kmd.dk | AS6834 KMD A/S |
| ns-auth04.kmd.dk | 131.165.4.5 | ns-auth04.kmd.dk | AS6834 KMD A/S |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 131.165.111.156 | 3600s | — | AS6834 | KMD A/S | 131.165.0.0/16 | 🇩🇰 Denmark | Copenhagen |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 3600s | . Null MX — domain accepts no email (RFC 7505) | |||
| TXT Record |
|---|
| v=spf1 -all |
| Policy | Record (holdfast.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| Policy | Record (_dmarc.holdfast.dk) |
|---|---|
| p=reject | v=DMARC1;p=reject;sp=reject;adkim=s;aspf=s;fo=1;pct=100;rua=mailto:dmarc@pensam.dk;ruf=mailto:dmarc@pensam.dk |
| www CNAME | holdfast.dk (all on holdfast.dk) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 10 iterations · 16-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 0/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2281 |
| Primary NS (MNAME) | ns-auth03.kmd.dk |
| Responsible (RNAME) | dnsadmin@kmd.dk |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 43200s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2004-09-07 |
| Expires | 2028-09-30 (707d) |
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 |
|---|---|---|---|
| 2026-10-23 01:58:42 | 601ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-21 16:42:04 | 1163ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-20 09:43:08 | 872ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-19 07:40:40 | 408ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-18 07:34:42 | 1264ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-17 06:57:54 | 591ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-16 06:54:05 | 424ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-15 06:12:15 | 437ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-14 04:55:19 | 1883ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-13 03:46:27 | 1151ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-12 02:01:42 | 540ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-10 23:35:51 | 529ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-09 20:45:23 | 1004ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-08 14:56:57 | 2706ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-07 14:51:23 | 598ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-06 14:30:18 | 411ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-05 13:53:20 | 1312ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-04 13:28:24 | 826ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-03 13:25:36 | 739ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-02 13:21:12 | 409ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-01 13:19:49 | 582ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-30 13:12:21 | 382ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-30 05:42:23 | 660ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-29 05:38:01 | 829ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-28 04:56:02 | 979ms | 2 NS 1 A 1 MX | 🔓 Insecure |