klausjensen.dk is a .dk domain served by 2 nameservers (betty.ns.cloudflare.com, lars.ns.cloudflare.com). It was registered on 19 April 2000 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.21.248 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 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 |
|---|---|---|---|---|---|---|---|
| 104.21.21.248 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.201.117 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | klausjensen.dk → 91.221.196.251 |
| 🔶 Autoconfig | klausjensen.dk → 91.221.196.251 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3031::6815:15f8 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3031::ac43:c975 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.21.248,172.67.201.117 ech=AEX+DQBBlAAgACCZmLgAZG9Fh5a11wQrUeeTsOll+5SRvdOZecjGhKOhRAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:15f8,2606:4700:3031::ac43:c975 |
| www | 91.221.196.251 (AS51468) (address records, no CNAME) |
| www vs bare domain | Different networks klausjensen.dk: 104.21.21.248 172.67.201.117 2606:4700:3031::6815:15f8 2606:4700:3031::ac43:c975 (AS13335) (all like this)www.klausjensen.dk: 91.221.196.251 (AS51468) |
| Wildcard | Yes: any name under the zone resolves |
| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.klausjensen.dk | klausjensen.dk |
| 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 | 2410199117 |
| Primary NS (MNAME) | betty.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 | 2000-04-19 |
| Expires | 2027-05-31 (222d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-20 23:36:34 | 458ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-05 03:45:36 | 2461ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-01 03:10:07 | 2223ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-30 02:52:59 | 1630ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-27 02:09:13 | 9469ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-23 23:22:30 | 588ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-15 17:20:36 | 761ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-12 19:53:51 | 929ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-05 18:59:12 | 760ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-01 01:37:43 | 1065ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-27 17:15:27 | 1056ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-23 12:59:52 | 859ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-22 12:05:38 shown | 9761ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-17 11:50:12 | 1099ms | 2 NS 2 A 0 MX | 🔓 Insecure |