poseidoncc.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 24 February 2026 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mx1.improvmx.com, mx2.improvmx.com. The zone is DNSSEC-signed and validates, has no 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.
| TXT Record |
|---|
| v=spf1 include:spf.improvmx.com ~all |
| Policy | Record (poseidoncc.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:spf.improvmx.com ~all |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves poseidoncc.dk: no address www.poseidoncc.dk: no address |
| 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 | resolution failed: ncache nxrrset |
| 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 | 2026-02-24 |
| Expires | 2027-02-23 (118d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 16:07:27 shown | 506ms | 3 NS 0 A 2 MX | 🔒 Secure |
| 2026-10-09 14:30:58 | 1034ms | 3 NS 0 A 2 MX | 🔒 Secure |
| 2026-10-04 06:08:30 | 666ms | 3 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-17 19:48:13 | 4058ms | 3 NS 0 A 2 MX | 🔒 Secure |