korthsen.dk is a .dk domain served by 2 nameservers (elias.ns.cloudflare.com, perla.ns.cloudflare.com). It was registered on 4 November 2005 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.19.225 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mail.kiil.net. The zone is not DNSSEC-signed, 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 |
|---|---|---|---|---|---|---|---|
| 104.21.19.225 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.190.109 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mail.kiil.net | 85.191.123.41 | mail.kiil.net | AS204274 AURA Fiber A/S |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3033::6815:13e1 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3033::ac43:be6d | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.19.225,172.67.190.109 ech=AEX+DQBBBwAgACBmlH+LvOTYt5gYyRMtM2VhcXhIHDi/UuOkwbqT4TIdYwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::6815:13e1,2606:4700:3033::ac43:be6d |
| TXT Record |
|---|
| v=spf1 mx a ?all |
| Policy | Record (korthsen.dk) |
|---|---|
| ?all (neutral) | v=spf1 mx a ?all |
| Policy | Record (_dmarc.korthsen.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; pct=100; rua=mailto:re+d8zf9dfb4ni@dmarc.postmarkapp.com; sp=none; aspf=r; |
| www | 188.114.96.1 188.114.97.1 2606:4700:3033::6815:13e1 2606:4700:3033::ac43:be6d (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network korthsen.dk: 104.21.19.225 172.67.190.109 2a06:98c1:3120::1 2a06:98c1:3121::1 (AS13335) www.korthsen.dk: 188.114.96.1 188.114.97.1 2606:4700:3033::6815:13e1 2606:4700:3033::ac43:be6d (AS13335) |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| — | RSA · ~2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
DNS lookups: 2/10 · policy: ?all
| 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 | 2412358341 |
| Primary NS (MNAME) | elias.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 | 2005-11-04 |
| Expires | 2026-11-30 (44d) |
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).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-15 14:27:45 | 693ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-23 18:26:11 | 1792ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-17 06:30:58 | 2634ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-28 10:45:17 | 10877ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-16 18:36:46 shown | 1252ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-18 21:55:07 | 1222ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-25 07:55:57 | 809ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-24 05:27:12 | 1014ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-18 15:33:22 | 2350ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-17 14:45:57 | 1731ms | 2 NS 2 A 1 MX | 🔓 Insecure |