www3f.dk is a .dk domain served by 2 nameservers (jay.ns.cloudflare.com, uma.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.16.181 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 |
|---|---|---|---|---|---|---|---|
| 104.21.16.181 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.215.63 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3030::6815:10b5 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3031::ac43:d73f | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.16.181,172.67.215.63 ech=AEX+DQBBugAgACCn1R8fSm59KslxYzTc8XhQZFLqU5RLYGsYztQqgHu2WAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::6815:10b5,2606:4700:3031::ac43:d73f |
| www | 104.21.16.181 172.67.215.63 2606:4700:3030::6815:10b5 2606:4700:3031::ac43:d73f (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.www3f.dk | 6bxxF4vWjWIyFW3qg_Q6DysMZBNavO_ypmVOE-mopmA |
| TXT | _acme-challenge.www3f.dk | GAGzhPkl3rfPxdG89NVl4wT5NmfOIKWZqxi952IPHYw |
| 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 | 2415582860 |
| Primary NS (MNAME) | jay.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 08:24:39 | 660ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-25 03:49:17 | 571ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-24 02:52:43 | 527ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-23 18:29:43 shown | 598ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-25 11:24:51 | 476ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-10 04:13:15 | 8740ms | 2 NS 2 A 0 MX | ❓ Unknown |
| 2026-07-26 01:20:46 | 8812ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-17 21:39:03 | 1020ms | 2 NS 2 A 0 MX | 🔓 Insecure |