kronborg-itsikkerhed.dk is a .dk domain served by 2 nameservers (jeremy.ns.cloudflare.com, kimora.ns.cloudflare.com). It was registered on 2 December 2024 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.4.112 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 |
|---|---|---|---|---|---|---|---|
| 104.21.4.112 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.132.5 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3031::ac43:8405 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3033::6815:470 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.4.112,172.67.132.5 ech=AEX+DQBBIAAgACC0zA43QQEPXf0h948Q6XRjN1sVQRaoZpeWL8pJJzaaYwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::ac43:8405,2606:4700:3033::6815:470 |
| www | NXDOMAIN |
| www vs bare domain | www does not resolve kronborg-itsikkerhed.dk: 104.21.4.112 172.67.132.5 2606:4700:3031::ac43:8405 2606:4700:3033::6815:470 (AS13335) (all like this)www.kronborg-itsikkerhed.dk: no address |
| Wildcard | No |
| 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 | 2415465874 |
| Primary NS (MNAME) | jeremy.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2024-12-02 |
| Expires | 2026-12-01 (40d) |
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).
| Domain | Registrar |
|---|---|
| christiankronborg.dk | Simply.com A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 17:42:23 shown | 2355ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-22 08:27:27 | 1413ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-15 07:24:13 | 9975ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-09 09:55:21 | 733ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-03 09:10:26 | 736ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-13 15:23:05 | 942ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-23 21:06:58 | 982ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-17 00:16:47 | 9005ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-23 14:44:55 | 1156ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-23 03:53:31 | 1131ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 19:31:56 | 850ms | 2 NS 1 A 4 MX | 🔒 Secure |