criticalthinking.dk is a .dk domain served by 2 nameservers (beth.ns.cloudflare.com, noah.ns.cloudflare.com). It was registered on 8 July 2026 (WHOIS) and first appeared in the .dk zone on 9 July 2026. Its website address 104.26.10.3 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx.simply.com. 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 |
|---|---|---|---|---|---|---|---|
| 104.26.10.3 | 300s | — | AS13335 | Cloudflare, Inc. | 104.26.0.0/20 | — | — |
| 104.26.11.3 | 300s | — | AS13335 | Cloudflare, Inc. | 104.26.0.0/20 | — | — |
| 172.67.70.230 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.64.0/18 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 300s | mx.simply.com | 94.231.106.20 | mx.simply.com | AS48854 team.blue Denmark A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 172.67.70.230 |
| 🔶 Autoconfig | 104.26.11.3 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:20::681a:a03 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:0:0:0:0:0:0/41 | — | — |
| 2606:4700:20::681a:b03 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:0:0:0:0:0:0/41 | — | — |
| 2606:4700:20::ac43:46e6 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:0:0:0:0:0:0/41 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h2" ipv4hint=104.26.10.3,104.26.11.3,172.67.70.230 ipv6hint=2606:4700:20::681a:a03,2606:4700:20::681a:b03,2606:4700:20::ac43:46e6 |
| www | 104.26.10.3 104.26.11.3 172.67.70.230 2606:4700:20::681a:a03 2606:4700:20::681a:b03 2606:4700:20::ac43:46e6 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network criticalthinking.dk: 104.26.10.3 104.26.11.3 172.67.70.230 2606:4700:20::681a:a03 (AS13335) www.criticalthinking.dk: 104.26.10.3 104.26.11.3 172.67.70.230 2606:4700:20::681a:a03 (AS13335) |
| Wildcard | Yes: any name under the zone resolves |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | A9D603AF4D7ED6B9246B4B68500CD6F2… |
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | 97A3BA009F39C761BFFB6574340E8138… |
| 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 | 2415204531 |
| Primary NS (MNAME) | beth.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2026-07-08 |
| Expires | 2027-07-07 (252d) |
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 |
|---|---|
| critical-thinking.dk | Simply.com A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-23 03:45:51 shown | 1478ms | 2 NS 3 A 1 MX | 🔓 Insecure |
| 2026-09-12 20:13:02 | 2257ms | 2 NS 3 A 1 MX | 🔓 Insecure |
| 2026-09-10 00:22:36 | 1664ms | 2 NS 3 A 1 MX | 🔓 Insecure |
| 2026-09-03 00:16:18 | 2549ms | 2 NS 3 A 1 MX | 🔓 Insecure |
| 2026-07-16 08:44:21 | 1989ms | 2 NS 3 A 1 MX | 🔓 Insecure |
| 2026-07-09 08:32:29 | 2376ms | 1 NS 0 A 0 MX | ❓ Unknown |