hackerone.dk is a .dk domain served by 2 nameservers (a.ns.hackerone.com, b.ns.hackerone.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.70.124 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 |
|---|---|---|---|---|---|---|---|
| 104.21.70.124 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.223.136 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3034::ac43:df88 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3035::6815:467c | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.70.124,172.67.223.136 ech=AEX+DQBB9QAgACAxPMx5Mhou1a8yXRyl1PvuT1X4xpXRYhwwU92FqX9YPwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::ac43:df88,2606:4700:3035::6815:467c |
| TXT Record |
|---|
| v=DMARC1; p=reject; rua=mailto:fgunarop@ag.dmarcian.com,mailto:dmarc-reports@hackerone.com; ruf=mailto:fgunarop@fr.dmarcian.com; |
| v=spf1 -all |
| Policy | Record (hackerone.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| www | 104.21.70.124 172.67.223.136 2606:4700:3034::ac43:df88 2606:4700:3035::6815:467c (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network hackerone.dk: 104.21.70.124 172.67.223.136 2606:4700:3034::ac43:df88 2606:4700:3035::6815:467c (AS13335) www.hackerone.dk: 104.21.70.124 172.67.223.136 2606:4700:3034::ac43:df88 2606:4700:3035::6815:467c (AS13335) |
| Wildcard | No |
DNS lookups: 0/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.hackerone.dk | HzAOZ3EteOENCn54kR-L8FqdmgMVGJN4hf9cosTQIE4 |
| TXT | _acme-challenge.hackerone.dk | eBRsrJovF454HNYEbP-GKh3qIerjk6kFx4iYo7rAU34 |
| 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 | 2414755337 |
| Primary NS (MNAME) | a.ns.hackerone.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 12:36:20 | 4264ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-02 03:55:06 | 990ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-30 03:40:30 | 2766ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-27 04:11:18 | 2750ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-20 08:24:45 | 1444ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-14 19:21:39 shown | 2734ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-26 13:29:08 | 1258ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-09 08:59:40 | 622ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-17 06:32:31 | 2541ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-30 12:45:38 | 636ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-27 00:31:41 | 750ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-22 20:17:51 | 1179ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 10:48:30 | 1018ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-17 10:45:39 | 676ms | 2 NS 2 A 0 MX | 🔓 Insecure |