ffu.dk is a .dk domain served by 2 nameservers (diva.ns.cloudflare.com, harvey.ns.cloudflare.com). It was registered on 17 December 2020 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.64.234 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 |
|---|---|---|---|---|---|---|---|
| 104.21.64.234 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.137.179 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3033::6815:40ea | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::ac43:89b3 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.64.234,172.67.137.179 ech=AEX+DQBBqgAgACBToaOlI/XdWcaBs2n/e11+KUwoMzGMzoAzloPSQDMwAQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::6815:40ea,2606:4700:3037::ac43:89b3 |
| www | 104.21.64.234 172.67.137.179 2606:4700:3033::6815:40ea 2606:4700:3037::ac43:89b3 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.ffu.dk | bqD0RrkswS_Ygt8webBEdPjJiyZk9fZby3FX1-SOgec |
| TXT | _acme-challenge.ffu.dk | pkcu014zs-GFh7Ilbz1j5swOI0ktxkOp7qEV_EBz9f0 |
| 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 | 2413609523 |
| Primary NS (MNAME) | diva.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 | 2020-12-17 |
| Expires | 2026-12-31 (71d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-01 07:03:48 | 500ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-22 07:17:09 | 1072ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-07 01:16:19 | 1037ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-02 13:41:07 | 9510ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-31 12:07:53 shown | 2000ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-08 22:58:19 | 1743ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-24 08:14:41 | 2409ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-23 08:46:00 | 1172ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 09:24:58 | 604ms | 2 NS 2 A 0 MX | 🔓 Insecure |