regnskabkursus.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 7 May 2026 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mx.simply.com. The zone is DNSSEC-signed but currently fails validation, publishes a 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.
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mx.simply.com | 94.231.106.20 | mx.simply.com | AS48854 team.blue Denmark A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 94.231.103.135 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 10 | 10 | 443 | maildiscover.simply.com |
| TXT Record |
|---|
| v=spf1 include:spf.simply.com -all |
| Policy | Record (regnskabkursus.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.simply.com -all |
| Policy | Record (_dmarc.regnskabkursus.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:dmarc@robot.simply.com; ruf=mailto:dmarc@robot.simply.com; |
| www | 94.231.103.62 (AS48854) (address records, no CNAME) |
| 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: 1/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | 97A3BA009F39C761BFFB6574340E8138… |
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | A9D603AF4D7ED6B9246B4B68500CD6F2… |
| Check | Result |
|---|---|
| Validation Status | ⚠️ Bogus |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✓ Found |
| DNSKEY Record | ✗ Not found |
| Flags | resolution failed: failure |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2026-05-07 |
| Expires | 2027-05-06 (194d) |
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 |
|---|---|
| bogføringkursus.dk | Simply.com A/S |
| bogholderkursus.dk | Simply.com A/S |
| hracademy.dk | Simply.com A/S |
| hrguiden.dk | Simply.com A/S |
| longruppen.dk | Simply.com A/S |
| regnskabsakademi.dk | Simply.com A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-04 02:40:01 | 421ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-01 02:35:45 | 474ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-28 01:21:42 | 526ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-25 22:18:16 | 468ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-01 07:33:44 | 520ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-25 22:33:59 | 430ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-25 06:43:44 shown | 885ms | 3 NS 0 A 1 MX | ⚠️ Bogus |
| 2026-06-17 14:42:40 | 1111ms | 3 NS 1 A 1 MX | 🔒 Secure |