4thomsen.dk is a .dk domain served by 2 nameservers (justin.ns.cloudflare.com, marjory.ns.cloudflare.com). It was registered on 26 May 2025 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.224.18.200 is hosted by Netsite A/S (AS205206) in Denmark. Mail is handled by mail.protonmail.ch, mailsec.protonmail.ch. 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 185.224.18.200 | 60s | parked.netsite.host | AS205206 | Netsite A/S | 185.224.16.0/22 | 🇩🇰 Denmark | — |
| TXT Record |
|---|
| protonmail-verification=bf7cf8d61e01c23b2ac458259c5e67af7babfd03 |
| v=spf1 include:_spf.protonmail.ch ~all |
| Policy | Record (4thomsen.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.protonmail.ch ~all |
| Policy | Record (_dmarc.4thomsen.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine |
| www | 185.224.18.200 (AS205206) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 2/10 · policy: ~all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.4thomsen.dk | jnF6RWm6y3lb-yYKHvYSfslvqVhwBN7R2Xl1xBtTUno |
| TXT | _acme-challenge.4thomsen.dk | ljrqhtpwN3HMNkM00ypaH7_WmxUjyohoBR2b6xI4aDc |
| 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 | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2416206484 |
| Primary NS (MNAME) | justin.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Netsite A/S |
| Registered | 2025-05-26 |
| Expires | 2027-05-25 (220d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 14:31:37 | 758ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-04 03:08:25 | 532ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-01 12:10:44 | 793ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-30 12:08:41 shown | 582ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-30 07:45:28 | 1049ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-19 14:45:02 | 928ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-26 10:35:45 | 650ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-06 02:04:47 | 1582ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-01 16:48:23 | 1387ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-07-15 08:14:45 | 10008ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-07-08 14:44:55 | 2129ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-24 05:35:48 | 858ms | 2 NS 1 A 2 MX | ❓ Unknown |
| 2026-06-16 12:52:56 | 1803ms | 2 NS 1 A 2 MX | 🔓 Insecure |