kurserne.dk is a .dk domain served by 2 nameservers (amy.ns.cloudflare.com, kip.ns.cloudflare.com). It was registered on 10 November 2010 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.7.173 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by route1.mx.cloudflare.net, route3.mx.cloudflare.net and 1 more. The zone is not DNSSEC-signed, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 104.21.7.173 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.187.244 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3031::6815:7ad | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3034::ac43:bbf4 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.7.173,172.67.187.244 ech=AEX+DQBBtAAgACCVeA0j31/XfvsNvEgjO9EDYT/5yvgEE/G6xmPiW4LFDgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:7ad,2606:4700:3034::ac43:bbf4 |
| TXT Record |
|---|
| google-site-verification=GeLruyzM0eoSQIw0h244Jn-bwEdMLx39zsGy8td3ZPc |
| v=spf1 include:_spf.mx.cloudflare.net ~all |
| Policy | Record (kurserne.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.mx.cloudflare.net ~all |
| Policy | Record (_dmarc.kurserne.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine rua=mailto:23a46f784ffb498c97db8954576e6485@dmarc-reports.cloudflare.net |
| www | 104.21.7.173 172.67.187.244 2606:4700:3031::6815:7ad 2606:4700:3034::ac43:bbf4 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network kurserne.dk: 104.21.7.173 172.67.187.244 2606:4700:3031::6815:7ad 2606:4700:3034::ac43:bbf4 (AS13335) www.kurserne.dk: 104.21.7.173 172.67.187.244 2606:4700:3031::6815:7ad 2606:4700:3034::ac43:bbf4 (AS13335) |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| — | RSA · ~2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
DNS lookups: 1/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| 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.route1.mx.cloudflare.net | DANE-TA · SPKI · SHA-256 | 59E738E674221702AF1EDB87C5200C1A… |
| 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 | 9BE5B7D47F9EFF930C11EB04D27CAE6B… |
| 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… |
| 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 | 2406674909 |
| Primary NS (MNAME) | amy.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 | 2010-11-10 |
| Expires | 2030-11-30 (1499d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-07 15:58:09 | 727ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-10-03 01:45:13 | 975ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-10-02 01:42:44 | 1208ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-30 01:15:31 | 707ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-04 07:47:39 | 998ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-05 22:50:09 | 1801ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-07-05 03:03:42 | 4658ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-07-03 01:15:04 | 1903ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-06-28 00:28:30 shown | 2508ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-06-23 11:18:12 | 1197ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-06-19 02:44:54 | 1660ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-06-18 15:37:53 | 1223ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-06-17 11:41:09 | 2640ms | 2 NS 2 A 3 MX | 🔓 Insecure |