matematikmedfamilien.dk is a .dk domain served by 2 nameservers (dorthy.ns.cloudflare.com, rex.ns.cloudflare.com). It was registered on 19 July 2024 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.19.200 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 |
|---|---|---|---|---|---|---|---|
| 104.21.19.200 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.188.154 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 172.67.188.154 |
| 🔶 Autoconfig | 188.114.97.1 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3036::6815:13c8 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::ac43:bc9a | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=188.114.96.1,188.114.97.1 ech=AEX+DQBBQQAgACARhLJM9qASB4fI9tI8HFssvb+3lTGqbJau9L/IbfsAKQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2a06:98c1:3120::1,2a06:98c1:3121::1 |
| www | 104.21.19.200 172.67.188.154 2a06:98c1:3120::1 2a06:98c1:3121::1 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network matematikmedfamilien.dk: 104.21.19.200 172.67.188.154 2606:4700:3036::6815:13c8 2606:4700:3037::ac43:bc9a (AS13335) www.matematikmedfamilien.dk: 104.21.19.200 172.67.188.154 2a06:98c1:3120::1 2a06:98c1:3121::1 (AS13335) |
| Wildcard | Yes: any name under the zone resolves |
| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.matematikmedfamilien.dk | kRAL66_D8k8dEckgKu15y_PZooukpP29MIVjmGSkxGY |
| TXT | _acme-challenge.matematikmedfamilien.dk | t3r-70RdBSBAMepx5WAPkUqTrGl-XhYlgsks1SO4EhA |
| 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 | 2417504487 |
| Primary NS (MNAME) | dorthy.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | DANDOMAIN A/S |
| Registered | 2024-07-19 |
| Expires | 2027-07-18 (267d) |
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 |
|---|---|---|---|
| 2026-10-15 17:03:19 shown | 1832ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-30 22:32:59 | 955ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-26 10:56:38 | 561ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-19 00:37:57 | 3865ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-17 04:26:18 | 3626ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-03 20:07:04 | 9719ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-20 16:55:05 | 431ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-18 06:40:36 | 770ms | 2 NS 2 A 0 MX | 🔓 Insecure |