hack.dk is a .dk domain served by 2 nameservers (alexandra.ns.cloudflare.com, terry.ns.cloudflare.com). It was registered on 27 October 2000 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.28.246 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mail.hack.dk. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.28.246 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.147.236 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mail.hack.dk | 51.254.46.8 | mail.prodnet.eu | AS16276 OVH SAS |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3031::ac43:93ec | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::6815:1cf6 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.28.246,172.67.147.236 ech=AEX+DQBBywAgACDflfUB9N33m4AmYQmDTDDzYNHc9VNWdpEseLEO8B1heQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::ac43:93ec,2606:4700:3037::6815:1cf6 |
| www | 104.21.28.246 172.67.147.236 2606:4700:3031::ac43:93ec 2606:4700:3037::6815:1cf6 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.hack.dk | 7cGQFVBS_WKwmSu4CxUCMSznnJ1qRY6sRUatAabmlDM |
| TXT | _acme-challenge.hack.dk | GMepoWdNESWSDvUsklVIGGOzqk7oSpUvm6GXL-VGfSA |
| TXT | _acme-challenge.hack.dk | HkwrQgu5KaUtliaRT3V6-KteGLOFJjxQrpXWtScOCGI |
| TXT | _acme-challenge.hack.dk | k5Fr0EM9NnA5qPOUrcTushxDpLjHifHQtphwRtxUszM |
| 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 | 2415855747 |
| Primary NS (MNAME) | alexandra.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2000-10-27 |
| Expires | 2026-12-31 (75d) |
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).
| Domain | Registrar |
|---|---|
| homofil.dk | Punktum dk A/S (direct) |
| securityfocus.dk | Punktum dk A/S (direct) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-02 10:25:05 | 726ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-29 05:28:08 | 904ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-26 04:31:57 shown | 1731ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-24 03:57:04 | 920ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-20 10:30:17 | 1218ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-15 13:28:18 | 2334ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-11 13:58:25 | 1246ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-01 08:04:30 | 1296ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-23 03:48:02 | 1470ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-17 10:52:06 | 918ms | 2 NS 2 A 1 MX | ❓ Unknown |
| 2026-06-17 10:43:29 | 851ms | 2 NS 2 A 1 MX | 🔓 Insecure |