brunnerctf.dk is a .dk domain served by 2 nameservers (evan.ns.cloudflare.com, selah.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.62.198 is hosted by Cloudflare, Inc. (AS13335). The zone is not DNSSEC-signed, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 104.21.62.198 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.138.194 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 172.67.138.194 |
| 🔶 Autoconfig | 172.67.138.194 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3030::6815:3ec6 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3033::ac43:8ac2 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.62.198,172.67.138.194 ech=AEX+DQBBJAAgACD85R02NA6Jq0XcH/MGNYLbyBFf94GbegL4A6BRnzfWVQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::6815:3ec6,2606:4700:3033::ac43:8ac2 |
| TXT Record |
|---|
| brevo-code:88a43421d3f4e141eeefca9089eea1f8 |
| Policy | Record (_dmarc.brunnerctf.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; rua=mailto:rua@dmarc.brevo.com |
| www | 104.21.62.198 172.67.138.194 2606:4700:3030::6815:3ec6 2606:4700:3033::ac43:8ac2 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network brunnerctf.dk: 104.21.62.198 172.67.138.194 2606:4700:3030::6815:3ec6 2606:4700:3033::ac43:8ac2 (AS13335) www.brunnerctf.dk: 104.21.62.198 172.67.138.194 2606:4700:3030::6815:3ec6 2606:4700:3033::ac43:8ac2 (AS13335) |
| Wildcard | Yes: any name under the zone resolves |
| 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 | 2413726914 |
| Primary NS (MNAME) | evan.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 13:00:41 | 689ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-29 06:40:21 | 1144ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-26 05:21:24 | 765ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-22 14:28:00 | 1203ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-09 05:39:42 | 1073ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-05 18:55:53 shown | 702ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-28 09:34:22 | 754ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-27 06:10:00 | 11191ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-24 03:40:49 | 856ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-18 22:36:30 | 2519ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-13 16:21:51 | 2532ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-10 20:24:50 | 3404ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-09 15:08:50 | 984ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-08 09:45:24 | 1771ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-30 13:57:19 | 16762ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-24 14:39:45 | 829ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-30 04:43:25 | 821ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-26 13:18:10 | 901ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-16 17:15:18 | 384ms | 2 NS 2 A 0 MX | 🔓 Insecure |