21blackjack.dk is a .dk domain served by 2 nameservers (adel.ns.cloudflare.com, vick.ns.cloudflare.com). It was registered on 10 August 2023 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.1.65 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 |
|---|---|---|---|---|---|---|---|
| 104.21.1.65 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.128.188 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3031::6815:141 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3035::ac43:80bc | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.1.65,172.67.128.188 ech=AEX+DQBBVgAgACBSCnguuint6pSmgTUy95ya61JpQLx0VRPdhf6qwS6HKQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:141,2606:4700:3035::ac43:80bc |
| www | 104.21.1.65 172.67.128.188 2606:4700:3031::6815:141 2606:4700:3035::ac43:80bc (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network 21blackjack.dk: 104.21.1.65 172.67.128.188 2606:4700:3031::6815:141 2606:4700:3035::ac43:80bc (AS13335) www.21blackjack.dk: 104.21.1.65 172.67.128.188 2606:4700:3031::6815:141 2606:4700:3035::ac43:80bc (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 | 2416427262 |
| Primary NS (MNAME) | adel.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 | 2023-08-10 |
| Expires | 2027-08-09 (290d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-19 08:14:26 | 2063ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-18 07:22:00 | 475ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-03 13:35:58 | 407ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-02 18:15:14 shown | 1427ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-23 16:00:15 | 659ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-19 05:18:01 | 4822ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-17 22:14:22 | 945ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-08 01:55:05 | 920ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-16 12:44:43 | 502ms | 2 NS 2 A 0 MX | 🔓 Insecure |