justbook.dk is a .dk domain served by 2 nameservers (sara.ns.cloudflare.com, sevki.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.6.50 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 |
|---|---|---|---|---|---|---|---|
| 104.21.6.50 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.154.238 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3030::6815:632 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3033::ac43:9aee | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.6.50,172.67.154.238 ech=AEX+DQBBwwAgACDJRLwfHroIIIumGYwv7zqXmjAANRm4xp/27A20HNphHAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::6815:632,2606:4700:3033::ac43:9aee |
| www | NXDOMAIN |
| www vs bare domain | www does not resolve justbook.dk: 104.21.6.50 172.67.154.238 2606:4700:3030::6815:632 2606:4700:3033::ac43:9aee (AS13335) (all like this)www.justbook.dk: no address |
| Wildcard | No |
| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.justbook.dk | MyxYRUKlVzbaqP5IjZm-S8a2FiwpzH_QJL-8EoO3fuU |
| TXT | _acme-challenge.justbook.dk | Rx4iZmdVN0zLyfDxoHROyPyD4paHQm38A9sOeACBbdo |
| 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 | 2415767735 |
| Primary NS (MNAME) | sara.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 15:52:06 | 694ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-29 15:46:27 | 1566ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-28 15:31:59 | 570ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-26 15:09:29 shown | 10071ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-25 00:57:45 | 615ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-24 00:44:06 | 590ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-22 12:24:54 | 1202ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-12 12:35:51 | 589ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-03 16:28:21 | 1136ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-30 03:28:24 | 993ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-27 12:31:15 | 657ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-01 20:05:18 | 3829ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-28 10:50:14 | 774ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-27 22:51:17 | 707ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-23 07:57:46 | 1155ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-18 05:39:41 | 663ms | 2 NS 2 A 0 MX | 🔓 Insecure |