cetus.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was registered on 4 December 2000 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 135.181.154.166 is hosted by Hetzner Online GmbH (AS24940) in Finland. Mail is handled by cetus.dk. The zone is DNSSEC-signed and validates, publishes a DMARC policy and has no IPv6 address. 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 |
|---|---|---|---|---|---|---|---|
| 135.181.154.166 | 3600s | omega.kjen.dk | AS24940 | Hetzner Online GmbH | 135.181.0.0/16 | 🇫🇮 Finland | Helsinki |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | cetus.dk | 135.181.154.166 | omega.kjen.dk | AS24940 Hetzner Online GmbH |
| TXT Record |
|---|
| google-site-verification=hpGNt24f-5NsJnEMPJaAB4bPTzj6Gk2Y34j0ZHA7ypw |
| v=spf1 mx:cetus.dk -all |
| Policy | Record (cetus.dk) |
|---|---|
| -all (hard fail) | v=spf1 mx:cetus.dk -all |
| Policy | Record (_dmarc.cetus.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; pct=100; rua=mailto:postmaster@cetus.dk |
| www CNAME | cetus.dk (all on cetus.dk) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 1/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026101200 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2000-12-04 |
| Expires | 2030-12-31 (1535d) |
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 |
|---|---|
| bjerndrup.dk | Simply.com A/S |
| kjen.dk | Simply.com A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 19:32:53 shown | 992ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-02 05:39:28 | 1327ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-25 20:40:07 | 590ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-22 08:50:14 | 1144ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-21 11:12:48 | 851ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-19 20:10:04 | 823ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 20:10:35 | 511ms | 4 NS 1 A 1 MX | 🔒 Secure |