matematikmission.dk is a .dk domain served by 2 nameservers (arvind.ns.cloudflare.com, maya.ns.cloudflare.com). It was registered on 9 September 2026 (WHOIS) and first appeared in the .dk zone on 10 September 2026. Its website address 104.21.45.133 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 |
|---|---|---|---|---|---|---|---|
| 104.21.45.133 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.214.165 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3030::6815:2d85 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3036::ac43:d6a5 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.45.133,172.67.214.165 ech=AEX+DQBBNAAgACBEVvV6qv+2EGSHksMVtzMtBb0W4uDonEFEC5F+QK8lNAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::6815:2d85,2606:4700:3036::ac43:d6a5 |
| www | NXDOMAIN |
| www vs bare domain | www does not resolve matematikmission.dk: 104.21.45.133 172.67.214.165 2606:4700:3030::6815:2d85 2606:4700:3036::ac43:d6a5 (AS13335) (all like this)www.matematikmission.dk: no address |
| Wildcard | No |
| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.matematikmission.dk | DYd4kAJzwQFymPX62zCstonJmfXwxM-6vPNFVmUZQYg |
| TXT | _acme-challenge.matematikmission.dk | hypVxIS5K3Eq2qeNP0latOAlycfIAALJalNRLgWGbls |
| 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 | 2416188733 |
| Primary NS (MNAME) | arvind.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | dns.services ApS |
| Registered | 2026-09-09 |
| Expires | 2027-09-08 (316d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 10:52:41 | 953ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-02 07:43:14 | 700ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-01 07:35:34 | 752ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-30 07:28:26 shown | 680ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-28 06:59:36 | 631ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-24 05:39:47 | 643ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-15 21:13:23 | 1504ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-10 08:52:59 | 2861ms | 1 NS 0 A 0 MX | ❓ Unknown |