hackerone.dk is a .dk domain served by 2 nameservers (a.ns.hackerone.com, b.ns.hackerone.com). It was registered on 23 May 2015 (WHOIS) and 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 our latest 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+DQBBEQAgACAq+bawf8eSX5rRbUhc2BjqyJlyMTHWp6ro+SiHoi05fwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= 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| 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 | 2416390344 |
| Primary NS (MNAME) | a.ns.hackerone.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | ASCIO TECHNOLOGIES, CORP. DANMARK - FILIAL AF ASCIO TECHNOLOGIES, CORP. CANADA |
| Registered | 2015-05-23 |
| Expires | 2027-05-31 (221d) |
Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-21 07:53:40 shown | 4615ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 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 | 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 |