syku.dk is a .dk domain served by 2 nameservers (bill.ns.cloudflare.com, lina.ns.cloudflare.com). It was registered on 27 September 2018 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.92.7 is hosted by Cloudflare, Inc. (AS13335). The zone is DNSSEC-signed and validates, 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 |
|---|---|---|---|---|---|---|---|
| 104.21.92.7 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.183.254 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3030::6815:5c07 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3030::ac43:b7fe | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.92.7,172.67.183.254 ech=AEX+DQBBZAAgACAkrEn6gECgdEWk5PMhWUOSVTCvsfM0cKj3LV+x2nl/MQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::6815:5c07,2606:4700:3030::ac43:b7fe |
| TXT Record |
|---|
| v=spf1 ip4:89.188.76.213 include:spf.azehosting.net ip4:185.221.37.133 +a +mx ~all |
| Policy | Record (syku.dk) |
|---|---|
| ~all (soft fail) | v=spf1 ip4:89.188.76.213 include:spf.azehosting.net ip4:185.221.37.133 +a +mx ~all |
| www | 104.21.92.7 172.67.183.254 2606:4700:3030::6815:5c07 2606:4700:3030::ac43:b7fe (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 4/10 · policy: ~all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2417411220 |
| Primary NS (MNAME) | bill.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Netsite A/S |
| Registered | 2018-09-27 |
| Expires | 2030-09-30 (1440d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-14 12:54:05 shown | 1222ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-10-08 01:35:10 | 419ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-09-30 11:03:39 | 455ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-09-23 19:59:51 | 1417ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-08-10 22:46:21 | 957ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-20 11:32:56 | 842ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-01 17:48:16 | 861ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-19 18:35:27 | 2581ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-17 21:51:25 | 793ms | 2 NS 2 A 0 MX | 🔓 Insecure |