rc3d.dk is a .dk domain served by 2 nameservers (dahlia.ns.cloudflare.com, dom.ns.cloudflare.com). It was registered on 3 August 2026 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.66.163 is hosted by Cloudflare, Inc. (AS13335). The zone is not DNSSEC-signed, has no DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.66.163 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.205.112 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3033::ac43:cd70 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3036::6815:42a3 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.66.163,172.67.205.112 ech=AEX+DQBBTAAgACCauk+cc3c7hdEYGHKp9jDfKiQxLE1kjlr+Bg+h14waEwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::ac43:cd70,2606:4700:3036::6815:42a3 |
| www | 104.21.66.163 172.67.205.112 2606:4700:3033::ac43:cd70 2606:4700:3036::6815:42a3 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.rc3d.dk | 4fb0ES590MaTG233Ek8OT7YQP5zFPgQvVKnuOq8oufY |
| TXT | _acme-challenge.rc3d.dk | UIOtKgRuLFd5_oUJSYKQFchXlIxPc8-kU9O702TF_O0 |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2413402219 |
| Primary NS (MNAME) | dahlia.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Realtime Register B.V. |
| Registered | 2026-08-03 |
| Expires | 2027-08-02 (286d) |
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).
Showing 100 of 175.
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-15 13:24:07 | 473ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-14 12:19:31 | 1055ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-25 15:32:33 | 478ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-06 00:38:40 | 1436ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-28 18:00:41 shown | 1020ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-26 16:52:05 | 975ms | 2 NS 1 A 0 MX | 🔓 Insecure |
| 2026-08-25 03:43:01 | 1628ms | 2 NS 1 A 0 MX | 🔓 Insecure |
| 2026-08-20 23:33:33 | 4956ms | 2 NS 1 A 0 MX | 🔓 Insecure |
| 2026-08-13 20:31:55 | 2126ms | 2 NS 1 A 0 MX | 🔓 Insecure |
| 2026-08-07 15:59:29 | 1879ms | 2 NS 1 A 0 MX | 🔓 Insecure |
| 2026-07-31 08:50:31 | 8515ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-28 03:53:24 | 980ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-27 03:45:50 | 811ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-26 02:35:37 | 576ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-25 02:19:38 | 925ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-24 01:35:04 | 662ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-22 22:33:59 | 24667ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-21 06:46:36 | 8605ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-20 03:28:35 | 615ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-18 13:28:20 | 8652ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-17 06:25:13 | 770ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-13 04:52:26 | 2741ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-10 06:14:32 | 814ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-08 13:48:46 | 1036ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-06 13:50:42 | 913ms | 1 NS 0 A 0 MX | ❓ Unknown |