just-book.dk is a .dk domain served by 2 nameservers (sara.ns.cloudflare.com, sevki.ns.cloudflare.com). It was registered on 16 March 2007 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.39.184 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 |
|---|---|---|---|---|---|---|---|
| 104.21.39.184 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.171.46 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3034::ac43:ab2e | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3035::6815:27b8 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.39.184,172.67.171.46 ech=AEX+DQBBqQAgACCZMhop6ccgNJNhXgbP/BN6WBMSDGnfefZmY+5pDPH4IwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::ac43:ab2e,2606:4700:3035::6815:27b8 |
| www | NXDOMAIN |
| www vs bare domain | www does not resolve just-book.dk: 104.21.39.184 172.67.171.46 2606:4700:3034::ac43:ab2e 2606:4700:3035::6815:27b8 (AS13335) (all like this)www.just-book.dk: no address |
| 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 | 2416292789 |
| Primary NS (MNAME) | sara.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2007-03-16 |
| Expires | 2027-03-31 (158d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-01 17:37:04 shown | 2370ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-30 17:32:19 | 654ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-02 21:59:05 | 1201ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-31 17:38:42 | 1405ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-27 00:08:29 | 740ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-07 06:30:39 | 945ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-03 19:10:20 | 776ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-24 04:42:32 | 712ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-18 07:32:56 | 812ms | 2 NS 2 A 0 MX | 🔓 Insecure |