kursusbyen.dk is a .dk domain served by 2 nameservers (bonnie.ns.cloudflare.com, piotr.ns.cloudflare.com). It was registered on 19 August 2020 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.84.57 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 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 |
|---|---|---|---|---|---|---|---|
| 104.21.84.57 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.187.27 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3033::6815:5439 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::ac43:bb1b | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.84.57,172.67.187.27 ech=AEX+DQBBcQAgACC2N60Wqx88fyr48q222p0GoDcCY0mvrYWiczqFfifhIwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::6815:5439,2606:4700:3037::ac43:bb1b |
| TXT Record |
|---|
| google-site-verification=zQUBox6QT2NNoryMeoRrkE4aThDCoc4gwrn1JB8IlOI |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves kursusbyen.dk: no address www.kursusbyen.dk: no address |
| 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 | 2411569569 |
| Primary NS (MNAME) | bonnie.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 | 2020-08-19 |
| Expires | 2027-08-31 (311d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-16 04:42:16 | 3105ms | 2 NS 0 A 0 MX | 🔓 Insecure |
| 2026-10-09 12:36:58 | 466ms | 2 NS 0 A 0 MX | 🔓 Insecure |
| 2026-10-06 01:52:11 | 336ms | 2 NS 0 A 0 MX | 🔓 Insecure |
| 2026-10-01 01:30:05 | 360ms | 2 NS 0 A 0 MX | 🔓 Insecure |
| 2026-09-26 04:15:22 | 466ms | 2 NS 0 A 0 MX | 🔓 Insecure |
| 2026-08-26 12:21:35 | 533ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-17 15:46:53 | 968ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-11 23:49:07 shown | 862ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-02 18:54:03 | 9804ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-25 08:12:02 | 1275ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-23 18:10:45 | 1138ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-23 14:01:42 | 909ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 04:07:54 | 1139ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-19 12:36:26 | 704ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-17 19:38:08 | 1676ms | 2 NS 2 A 0 MX | 🔓 Insecure |