birkhus.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 6 March 2001 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by birkhus-dk.mail.protection.outlook.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 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 | — | — | — |
| TXT Record |
|---|
| MS=ms34102434 |
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (birkhus.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves birkhus.dk: no address www.birkhus.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 | 2021040809 |
| 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 | 2001-03-06 |
| Expires | 2027-03-31 (164d) |
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 |
|---|---|
| 3born.dk | Simply.com A/S |
| mertz-it.dk | Simply.com A/S |
| mortenm.dk | Simply.com A/S |
| omertz.dk | Simply.com A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-13 04:27:02 | 1750ms | 4 NS 0 A 1 MX | 🔒 Secure |
| 2026-10-01 16:44:44 | 1098ms | 4 NS 0 A 1 MX | 🔒 Secure |
| 2026-09-29 16:19:11 | 721ms | 4 NS 0 A 1 MX | 🔒 Secure |
| 2026-09-28 06:47:13 | 824ms | 4 NS 0 A 1 MX | 🔒 Secure |
| 2026-08-27 17:26:37 | 714ms | 4 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-26 19:09:00 | 2314ms | 4 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-16 14:47:46 | 676ms | 4 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-16 14:42:02 | 868ms | 4 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-16 14:41:01 shown | 836ms | 4 NS 0 A 1 MX | 🔒 Secure |