bluesys.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mail.entens.dk. The zone is DNSSEC-signed and validates, has no DMARC policy and has no IPv6 address. 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns1.simply.com | — | — | — |
| ns2.simply.com | — | — | — |
| ns3.simply.com | — | — | — |
| ns4.simply.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 212.54.83.130 | — | mail.entens.dk | AS9158 | — | — | — | Herlev |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | — | mail.entens.dk | 212.54.83.130 | mail.entens.dk | AS9158 Telenor A/S |
| TXT Record |
|---|
| v=spf1 mx include:entens.dk -all |
| Policy | Record (bluesys.dk) |
|---|---|
| -all (hard fail) | v=spf1 mx include:entens.dk -all |
| Flags | Tag | Value |
|---|---|---|
| 0 | issue | letsencrypt.org |
| www CNAME | bluesys.dk (all on bluesys.dk) → 212.54.83.130 (AS9158) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| 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: 3/10 · 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 | 2025111400 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-02 05:09:41 | 632ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-01 05:03:17 | 471ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-04 07:55:47 | 582ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-28 17:43:58 | 1791ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-23 13:58:13 | 697ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 15:19:18 shown | 1388ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 15:14:02 | 1921ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 15:00:45 | 525ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 15:00:17 | 602ms | 4 NS 1 A 1 MX | 🔒 Secure |