letsbook.dk is a .dk domain served by 2 nameservers (drake.ns.cloudflare.com, sima.ns.cloudflare.com). It was registered on 22 July 2026 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.23.249 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 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 |
|---|---|---|---|---|---|---|---|
| 104.21.23.249 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.214.185 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3033::ac43:d6b9 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3036::6815:17f9 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.23.249,172.67.214.185 ech=AEX+DQBBJwAgACC1gAs7SPXgb6WUAb5+aX6R6aWs2Ms7dQ85GugS6PsoGAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::ac43:d6b9,2606:4700:3036::6815:17f9 |
| www | 104.21.23.249 172.67.214.185 2606:4700:3033::ac43:d6b9 2606:4700:3036::6815:17f9 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network letsbook.dk: 104.21.23.249 172.67.214.185 2606:4700:3033::ac43:d6b9 2606:4700:3036::6815:17f9 (AS13335) www.letsbook.dk: 104.21.23.249 172.67.214.185 2606:4700:3033::ac43:d6b9 2606:4700:3036::6815:17f9 (AS13335) |
| Wildcard | No |
| 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 | 2415482621 |
| Primary NS (MNAME) | drake.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Obsidian Digital A/S |
| Registered | 2026-07-22 |
| Expires | 2027-07-21 (275d) |
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 831.
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-01 03:18:05 shown | 954ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-30 10:11:23 | 626ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-21 15:55:37 | 604ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-18 13:18:22 | 1178ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-28 00:36:20 | 1214ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-23 11:54:49 | 892ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-18 16:20:39 | 8878ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-17 13:44:38 | 632ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-16 12:36:47 | 609ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-15 02:35:39 | 653ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-12 10:19:26 | 552ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-09 10:17:59 | 16970ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-08 09:44:50 | 721ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-06 22:31:25 | 716ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-05 14:17:01 | 808ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-04 09:59:24 | 741ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-07-02 23:12:24 | 554ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 08:05:50 | 278ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 21:38:54 | 341ms | 0 NS 0 A 0 MX | ❓ Unknown |