sommerkursus.dk is a .dk domain served by 2 nameservers (emma.ns.cloudflare.com, gordon.ns.cloudflare.com). It was registered on 12 December 2021 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.73.214 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 |
|---|---|---|---|---|---|---|---|
| 104.21.73.214 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.149.231 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3035::6815:49d6 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3035::ac43:95e7 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.73.214,172.67.149.231 ech=AEX+DQBBYAAgACBILetPK9QrZ/VzX/ENbUdmxXL01gQYlU9KA2XkyHc4VQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3035::6815:49d6,2606:4700:3035::ac43:95e7 |
| www | 104.21.73.214 172.67.149.231 2606:4700:3035::6815:49d6 2606:4700:3035::ac43:95e7 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network sommerkursus.dk: 104.21.73.214 172.67.149.231 2606:4700:3035::6815:49d6 2606:4700:3035::ac43:95e7 (AS13335) www.sommerkursus.dk: 104.21.73.214 172.67.149.231 2606:4700:3035::6815:49d6 2606:4700:3035::ac43:95e7 (AS13335) |
| Wildcard | No |
| 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 | 2416756943 |
| Primary NS (MNAME) | emma.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 | 2021-12-12 |
| Expires | 2026-12-11 (52d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-07 07:30:36 shown | 1229ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-30 02:36:22 | 454ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-14 14:31:05 | 2426ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-22 07:44:46 | 1285ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-21 07:34:29 | 6021ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-09 08:39:37 | 8956ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-16 05:06:49 | 2707ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-26 23:39:52 | 753ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-19 20:11:23 | 2698ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-18 06:04:45 | 1117ms | 2 NS 2 A 0 MX | 🔓 Insecure |