zeroday.dk is a .dk domain served by 2 nameservers (dee.ns.cloudflare.com, marty.ns.cloudflare.com). It was registered on 9 February 2023 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.16.50 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by route1.mx.cloudflare.net, route2.mx.cloudflare.net and 1 more. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.16.50 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.166.103 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3032::6815:1032 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3034::ac43:a667 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.16.50,172.67.166.103 ech=AEX+DQBBYAAgACCJZ1leMVMbmCc0pzdNvjnuMru7KJiQ0WD9PVIOy9PnMgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::6815:1032,2606:4700:3034::ac43:a667 |
| TXT Record |
|---|
| v=spf1 include:_spf.mx.cloudflare.net ~all |
| Policy | Record (zeroday.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.mx.cloudflare.net ~all |
| www | Exists, no address |
| www vs bare domain | www does not resolve zeroday.dk: 104.21.16.50 172.67.166.103 2606:4700:3032::6815:1032 2606:4700:3034::ac43:a667 (AS13335) (all like this)www.zeroday.dk: no address |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | Delete signal: the zone asks the registry to remove its DS (go insecure) 1 CDS, 1 CDNSKEY |
DNS lookups: 1/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.route1.mx.cloudflare.net | DANE-TA · SPKI · SHA-256 | 59E738E674221702AF1EDB87C5200C1A… |
| SMTP _25._tcp.route1.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 0F0C6C164A36F97E7B4C5A5B69D6F4F2… |
| SMTP _25._tcp.route1.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 9BE5B7D47F9EFF930C11EB04D27CAE6B… |
| SMTP _25._tcp.route2.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 0F0C6C164A36F97E7B4C5A5B69D6F4F2… |
| SMTP _25._tcp.route2.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 9BE5B7D47F9EFF930C11EB04D27CAE6B… |
| SMTP _25._tcp.route2.mx.cloudflare.net | DANE-TA · SPKI · SHA-256 | 59E738E674221702AF1EDB87C5200C1A… |
| SMTP _25._tcp.route3.mx.cloudflare.net | DANE-TA · SPKI · SHA-256 | 59E738E674221702AF1EDB87C5200C1A… |
| SMTP _25._tcp.route3.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 0F0C6C164A36F97E7B4C5A5B69D6F4F2… |
| SMTP _25._tcp.route3.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 9BE5B7D47F9EFF930C11EB04D27CAE6B… |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2416911459 |
| Primary NS (MNAME) | dee.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 | 2023-02-09 |
| Expires | 2027-02-08 (112d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 03:26:07 shown | 3982ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-10-03 22:54:17 | 667ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-10-03 13:24:44 | 885ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-26 12:51:23 | 1030ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-20 16:22:29 | 1148ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-03 23:26:24 | 824ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-11 10:22:15 | 1795ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-09 21:17:45 | 9088ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-07-20 20:35:09 | 10215ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-07-16 17:03:30 | 2618ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-07-02 15:11:18 | 2999ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-06-26 03:24:42 | 992ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-06-20 07:25:30 | 1003ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-06-18 07:44:05 | 1681ms | 2 NS 2 A 3 MX | 🔓 Insecure |