preotec.dk is a .dk domain served by 2 nameservers (martin.ns.cloudflare.com, rosalyn.ns.cloudflare.com). It was registered on 21 April 2022 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.17.49 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 |
|---|---|---|---|---|---|---|---|
| 104.21.17.49 | 600s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.222.79 | 600s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3034::6815:1131 | 600s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3034::ac43:de4f | 600s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.17.49,172.67.222.79 ech=AEX+DQBBfQAgACDyE0q9sCdfoHtdaJIQ+/TpbBEr4803v8+L2EgfJ2aucwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::6815:1131,2606:4700:3034::ac43:de4f |
| TXT Record |
|---|
| v=spf1 mx -all |
| Policy | Record (preotec.dk) |
|---|---|
| -all (hard fail) | v=spf1 mx -all |
| www | 104.21.17.49 172.67.222.79 2606:4700:3034::6815:1131 2606:4700:3034::ac43:de4f (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
DNS lookups: 1/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.preotec.dk | My3JDkvq4nNPvVEQIQlpU2b8gHiQawR8d7dMNxA2gQM |
| TXT | _acme-challenge.preotec.dk | V0u2EMl8gWlyLIT8BP3_qkJzqd9qeARTruBHPrH8gYs |
| 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 | 2407481500 |
| Primary NS (MNAME) | martin.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | united-domains GmbH |
| Registered | 2022-04-21 |
| Expires | 2027-04-20 (181d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 19:46:54 | 595ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-06 10:13:34 | 10314ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-24 16:44:00 | 568ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-23 11:36:38 | 870ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-15 00:37:09 | 3077ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-29 00:37:19 | 694ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-25 04:44:17 | 700ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-23 13:42:03 shown | 1158ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-21 09:44:48 | 1171ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-19 04:47:53 | 3521ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-17 12:55:04 | 2725ms | 2 NS 2 A 0 MX | 🔓 Insecure |