schack-linnemann.dk is a .dk domain served by 2 nameservers (aryanna.ns.cloudflare.com, nicolas.ns.cloudflare.com). It was registered on 3 July 2000 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.15.159 is hosted by Cloudflare, Inc. (AS13335). The zone is DNSSEC-signed but currently fails validation, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 104.21.15.159 | — | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.163.27 | — | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3030::6815:f9f | — | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3031::ac43:a31b | — | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.15.159,172.67.163.27 ech=AEX+DQBBLQAgACCrQdpb2a3PDJIlRena30f6iXhyGTgVnWbVR/N7meI8EgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::6815:f9f,2606:4700:3031::ac43:a31b |
| TXT Record |
|---|
| v=spf1 a:post.schack-linnemann.dk ip4:91.226.145.155 -all |
| Policy | Record (schack-linnemann.dk) |
|---|---|
| -all (hard fail) | v=spf1 a:post.schack-linnemann.dk ip4:91.226.145.155 -all |
| Policy | Record (_dmarc.schack-linnemann.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; rua=mailto:postmaster@schack-linnemann.dk |
| www | Exists, no address |
| www vs bare domain | www does not resolve schack-linnemann.dk: 104.21.15.159 172.67.163.27 2606:4700:3030::6815:f9f 2606:4700:3032::ac43:a31b (AS13335) (all like this)www.schack-linnemann.dk: no address |
| 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: 1/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | ⚠️ Bogus |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | broken trust chain resolving 'schack-linnemann.dk/A/IN': 127.0.0.1#53 |
| Field | Value |
|---|---|
| Serial | 2407131805 |
| Primary NS (MNAME) | aryanna.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Domænehajen ApS |
| Registered | 2000-07-03 |
| Expires | 2027-09-30 (340d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-21 19:12:07 | 509ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-10-19 07:31:16 | 1158ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-10-04 08:47:31 | 704ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-10-01 08:37:14 | 822ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-30 08:26:43 | 805ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-27 17:26:53 | 9566ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-25 01:50:27 | 862ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-20 19:52:52 | 1738ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-18 19:42:10 | 2730ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-06 16:26:30 | 976ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-22 11:49:22 | 1093ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-20 06:43:05 | 1147ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-17 19:16:52 shown | 4704ms | 2 NS 2 A 0 MX | ⚠️ Bogus |