castenskiold.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 135.181.43.39 is hosted by Hetzner Online GmbH (AS24940) in Finland. Mail is handled by mail.protonmail.ch, mailsec.protonmail.ch. The zone is DNSSEC-signed and validates, 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 135.181.43.39 | 3600s | static.39.43.181.135.clients.your-server.de | AS24940 | Hetzner Online GmbH | 135.181.0.0/16 | 🇫🇮 Finland | Helsinki |
| TXT Record |
|---|
| protonmail-verification=ec8216c83eef5b0ab5347ad503cc453727328d4b |
| v=spf1 include:_spf.protonmail.ch ~all |
| vpe=9e83678c |
| Policy | Record (castenskiold.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.protonmail.ch ~all |
| Policy | Record (_dmarc.castenskiold.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine |
| www | Address record (no CNAME) |
| 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: 2/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026060302 |
| 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 |
|---|---|---|---|
| 2026-09-30 12:40:43 | 657ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-23 16:34:22 | 610ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-11 00:04:24 shown | 626ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-26 19:14:20 | 673ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-24 15:33:25 | 691ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-21 05:56:18 | 2442ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-16 19:43:50 | 650ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-16 19:41:28 | 655ms | 2 NS 1 A 2 MX | 🔒 Secure |