studentsystems.dk is a .dk domain served by 2 nameservers (susan.ns.cloudflare.com, tosana.ns.cloudflare.com). It was registered on 14 August 2026 (WHOIS) and first appeared in the .dk zone on 15 August 2026. Its website address 104.21.50.212 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 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 |
|---|---|---|---|---|---|---|---|
| 104.21.50.212 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.167.115 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3031::ac43:a773 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3033::6815:32d4 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.50.212,172.67.167.115 ech=AEX+DQBBbQAgACC4bXkO/CM2lDhGvQrkr9fDR3Zk7pt8YuHlvWzdLiqDBAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::ac43:a773,2606:4700:3033::6815:32d4 |
| TXT Record |
|---|
| v=spf1 include:_spf.mx.cloudflare.net include:spf.smtp2go.com ~all |
| Policy | Record (studentsystems.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.mx.cloudflare.net include:spf.smtp2go.com ~all |
| www | NXDOMAIN |
| www vs bare domain | www does not resolve studentsystems.dk: 104.21.50.212 172.67.167.115 2606:4700:3031::ac43:a773 2606:4700:3033::6815:32d4 (AS13335) (all like this)www.studentsystems.dk: no address |
| Wildcard | No |
DNS lookups: 2/10 · policy: ~all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.studentsystems.dk | 0-w6zNrnkM47tM67h16FRe452pk4eYfp5s8JRgmqvSo |
| TXT | _acme-challenge.studentsystems.dk | YDa6ffc055QR_ydCvLaNbaZZ_g0Kq7RNPI3EuA8y2jI |
| 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-TA · SPKI · SHA-256 | 59E738E674221702AF1EDB87C5200C1A… |
| 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.route3.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 0F0C6C164A36F97E7B4C5A5B69D6F4F2… |
| SMTP _25._tcp.route3.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 9BE5B7D47F9EFF930C11EB04D27CAE6B… |
| SMTP _25._tcp.route3.mx.cloudflare.net | DANE-TA · SPKI · SHA-256 | 59E738E674221702AF1EDB87C5200C1A… |
| 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 | 2413393065 |
| Primary NS (MNAME) | susan.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 | 2026-08-14 |
| Expires | 2027-08-13 (297d) |
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 |
|---|---|
| byboe.dk | Simply.com A/S |
| dejligehvalpe.dk | Simply.com A/S |
| djboye.dk | Punktum dk A/S (direct) |
| studentplan.dk | Simply.com A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 18:50:23 | 2635ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-10-08 12:07:11 | 1245ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-28 05:10:20 | 1305ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-29 12:03:11 | 1277ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-28 11:48:15 shown | 1735ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-27 11:30:51 | 2448ms | 2 NS 0 A 0 MX | 🔓 Insecure |
| 2026-08-24 15:30:55 | 933ms | 2 NS 0 A 0 MX | 🔓 Insecure |
| 2026-08-23 10:38:43 | 1404ms | 2 NS 0 A 0 MX | 🔓 Insecure |
| 2026-08-21 08:35:13 | 1489ms | 2 NS 0 A 0 MX | 🔓 Insecure |
| 2026-08-18 06:21:27 | 2052ms | 2 NS 0 A 0 MX | 🔓 Insecure |
| 2026-08-16 23:02:09 | 2419ms | 2 NS 0 A 0 MX | 🔓 Insecure |
| 2026-08-15 08:37:13 | 3929ms | 2 NS 0 A 0 MX | 🔓 Insecure |