holkenfeldt.dk is a .dk domain served by 2 nameservers (ns.dandomain.dk, ns2.dandomain.dk). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 194.255.15.4 is hosted by Norlys Telco A/S (AS3308) in Denmark. Mail is handled by mx.spamfilter.io. 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 |
|---|---|---|---|---|---|---|---|
| 194.255.15.4 | 86400s | 4.0-27.15.255.194.in-addr.arpa www.dandomain.dk |
AS3308 | Norlys Telco A/S | 194.255.0.0/16 | 🇩🇰 Denmark | Copenhagen |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscoverredirect.webexchange.nu → 212.237.249.80 |
| TXT Record |
|---|
| v=spf1 a include:spf.dandomain.dk ~all |
| Policy | Record (holkenfeldt.dk) |
|---|---|
| ~all (soft fail) | v=spf1 a include:spf.dandomain.dk ~all |
| www | 194.255.15.4 (AS3308) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 4/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx.spamfilter.io | DANE-EE · SPKI · SHA-256 | 9A25F05F2E322DABDCC9B7A06AB47A2D… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2021090100 |
| Primary NS (MNAME) | ns.dandomain.dk |
| Responsible (RNAME) | hostmaster@dandomain.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-27 00:02:43 shown | 522ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-01 12:47:59 | 546ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-22 20:06:15 | 16997ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-27 18:45:30 | 1242ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-26 10:59:27 | 1601ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-24 12:38:17 | 3120ms | 2 NS 1 A 1 MX | ⚠️ Bogus |
| 2026-06-23 23:02:51 | 1178ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 11:51:45 | 839ms | 2 NS 1 A 1 MX | 🔒 Secure |