osys.dk is a .dk domain served by 2 nameservers (ricardo.ns.cloudflare.com, ruth.ns.cloudflare.com). It was registered on 28 May 2023 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.52.214 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by aspmx.l.google.com, alt1.aspmx.l.google.com and 3 more. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.52.214 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.204.27 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 104.21.52.214 |
| 🔶 Autoconfig | 188.114.97.1 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a06:98c1:3120::1 | 300s | — | AS13335 | Cloudflare, Inc. | 2a06:98c1:3120:0:0:0:0:0/46 | — | — |
| 2a06:98c1:3121::1 | 300s | — | AS13335 | Cloudflare, Inc. | 2a06:98c1:3120:0:0:0:0:0/46 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.52.214,172.67.204.27 ech=AEX+DQBBpgAgACBX0oB34SpcnXkHtKM2j/+fFZo1n71TgeCEnIYgUCjlNgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::6815:34d6,2606:4700:3033::ac43:cc1b |
| TXT Record |
|---|
| google-site-verification=BETwDbC8yigzvu5F7pgI6686vlva7jMpaa8RbUZgkus |
| v=spf1 include:_spf.google.com -all |
| Policy | Record (osys.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:_spf.google.com -all |
| www | 188.114.96.1 188.114.97.1 2a06:98c1:3120::1 2a06:98c1:3121::1 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network osys.dk: 104.21.52.214 172.67.204.27 2a06:98c1:3120::1 2a06:98c1:3121::1 (AS13335) www.osys.dk: 188.114.96.1 188.114.97.1 2a06:98c1:3120::1 2a06:98c1:3121::1 (AS13335) |
| Wildcard | Yes: any name under the zone resolves |
DNS lookups: 1/10 · policy: -all
No problems found| 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 | 2417965357 |
| Primary NS (MNAME) | ricardo.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 | 2023-05-28 |
| Expires | 2027-05-27 (218d) |
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).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-20 13:12:05 shown | 2802ms | 2 NS 2 A 5 MX | 🔓 Insecure |
| 2026-10-06 19:40:56 | 3903ms | 2 NS 2 A 5 MX | 🔓 Insecure |
| 2026-10-03 17:53:01 | 550ms | 2 NS 2 A 5 MX | 🔓 Insecure |
| 2026-09-30 23:43:32 | 900ms | 2 NS 2 A 5 MX | 🔓 Insecure |
| 2026-09-09 17:18:14 | 3290ms | 2 NS 2 A 5 MX | 🔓 Insecure |
| 2026-08-22 18:58:31 | 2336ms | 2 NS 2 A 5 MX | 🔓 Insecure |
| 2026-08-08 17:47:53 | 1909ms | 2 NS 2 A 5 MX | 🔓 Insecure |
| 2026-06-27 05:39:36 | 1005ms | 2 NS 2 A 5 MX | 🔓 Insecure |
| 2026-06-22 19:43:19 | 1025ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 23:01:36 | 998ms | 2 NS 2 A 5 MX | 🔓 Insecure |