jacobk.dk is a .dk domain served by 2 nameservers (april.ns.cloudflare.com, ganz.ns.cloudflare.com). It was registered on 14 February 2026 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.55.243 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 |
|---|---|---|---|---|---|---|---|
| 104.21.55.243 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.174.135 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3031::6815:37f3 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3032::ac43:ae87 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.55.243,172.67.174.135 ech=AEX+DQBBcgAgACC57J04PGBzGoJvYLUnlJ6rVPgXoqv3N3KfZtnkvDQ/GAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:37f3,2606:4700:3032::ac43:ae87 |
| www | 104.21.55.243 172.67.174.135 2606:4700:3031::6815:37f3 2606:4700:3032::ac43:ae87 (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 |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2417326361 |
| Primary NS (MNAME) | april.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2026-02-14 |
| Expires | 2028-02-13 (479d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 23:44:37 shown | 2586ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-09 10:20:44 | 1271ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-03 05:43:30 | 510ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-19 18:47:23 | 1539ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-26 21:31:25 | 979ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-12 08:53:56 | 1039ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-07 18:43:01 | 2855ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-20 11:00:54 | 936ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-11 23:46:51 | 16898ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-20 07:51:05 | 2670ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-18 07:43:09 | 952ms | 2 NS 2 A 0 MX | 🔓 Insecure |