ravkursus.dk is a .dk domain served by 2 nameservers (hans.ns.cloudflare.com, katja.ns.cloudflare.com). It was registered on 2 September 2021 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.79.250 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 |
|---|---|---|---|---|---|---|---|
| 104.21.79.250 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.172.8 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3032::ac43:ac08 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3035::6815:4ffa | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.79.250,172.67.172.8 ech=AEX+DQBBBAAgACASL9cWwm8usnQJYTI8SMnx4M7BtZGkp2f/KxVN+iBJAAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::ac43:ac08,2606:4700:3035::6815:4ffa |
| www | 104.21.79.250 172.67.172.8 2606:4700:3032::ac43:ac08 2606:4700:3035::6815:4ffa (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network ravkursus.dk: 104.21.79.250 172.67.172.8 2606:4700:3032::ac43:ac08 2606:4700:3035::6815:4ffa (AS13335) www.ravkursus.dk: 104.21.79.250 172.67.172.8 2606:4700:3032::ac43:ac08 2606:4700:3035::6815:4ffa (AS13335) |
| Wildcard | No |
| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.ravkursus.dk | 3z-RMD1BMYrhdaw1i0TyBl3G3rTNRg7rnBSKTXtyXpw |
| TXT | _acme-challenge.ravkursus.dk | w0n4j8jKFDgBW1rEG7sCqZhnwW4Fpu2aj_YoXcC1ZzM |
| 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 | 2417755790 |
| Primary NS (MNAME) | hans.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | DANDOMAIN A/S |
| Registered | 2021-09-02 |
| Expires | 2026-09-30 (expired) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-18 19:11:01 shown | 435ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-03 10:15:15 | 540ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-30 22:24:01 | 711ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-23 22:51:57 | 2449ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-18 20:04:36 | 1072ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-26 23:06:23 | 693ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-25 00:59:44 | 9482ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-21 04:22:07 | 6077ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-20 02:41:10 | 1354ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-18 05:03:57 | 2566ms | 2 NS 1 A 0 MX | 🔒 Secure |