sis-denmark.dk is a .dk domain served by 2 nameservers (amit.ns.cloudflare.com, kira.ns.cloudflare.com). It was registered on 24 August 2018 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.57.46 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 |
|---|---|---|---|---|---|---|---|
| 104.21.57.46 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.141.241 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3032::ac43:8df1 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3035::6815:392e | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.57.46,172.67.141.241 ech=AEX+DQBBeAAgACDjKaunlIPwdp7tbfRj7r0QgutE5Y8n7/khxelj1YhEGgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::ac43:8df1,2606:4700:3035::6815:392e |
| www | 104.21.57.46 172.67.141.241 2606:4700:3032::ac43:8df1 2606:4700:3035::6815:392e (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network sis-denmark.dk: 104.21.57.46 172.67.141.241 2606:4700:3032::ac43:8df1 2606:4700:3035::6815:392e (AS13335) www.sis-denmark.dk: 104.21.57.46 172.67.141.241 2606:4700:3032::ac43:8df1 2606:4700:3035::6815:392e (AS13335) |
| 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 |
| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.sis-denmark.dk | UzNvx8VdINLfyGFBSbK5wM8lyYIvnvGOGUp7WlYw2lI |
| TXT | _acme-challenge.sis-denmark.dk | pEwUFtNWa_5KWlm8BWyQO80i5JUxlbL6hgcL1Vjjaw8 |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2417593197 |
| Primary NS (MNAME) | amit.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Abion AB |
| Registered | 2018-08-24 |
| Expires | 2027-08-31 (316d) |
Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-16 06:06:14 shown | 1368ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-01 07:21:03 | 1801ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-30 07:11:19 | 491ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-09-29 07:02:26 | 935ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-09-27 06:05:03 | 556ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-24 23:49:30 | 731ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-23 23:02:49 | 1252ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-28 20:40:22 | 953ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-20 13:09:32 | 6727ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-19 05:22:28 | 3011ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-16 13:48:29 | 2545ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-04 12:56:28 | 9697ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-27 08:53:28 | 8806ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-13 18:25:45 | 1208ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-20 06:50:24 | 718ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-17 23:38:27 | 656ms | 2 NS 2 A 0 MX | 🔓 Insecure |