bykronborg.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 21 October 2022 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.104.202.80 is hosted by It Forum Gruppen A/s (AS50346) in Denmark. Mail is handled by bykronborg-dk.mail.protection.outlook.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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns1.simply.com | — | — | — |
| ns2.simply.com | — | — | — |
| ns3.simply.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 193.104.202.80 | — | mbx.itsecurity.dk | AS50346 | It Forum Gruppen A/s | 193.104.202.0/24 | 🇩🇰 Denmark | Virum |
| TXT Record |
|---|
| MS=ms27971168 |
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (bykronborg.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.bykronborg.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject |
| www | 193.104.202.80 (AS50346) (address records, no CNAME) |
| 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 | ⚠️ Bogus |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | broken trust chain resolving 'bykronborg.dk/A/IN': 127.0.0.1#53 |
| Field | Value |
|---|---|
| Serial | 2024052301 |
| 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 | 2022-10-21 |
| Expires | 2027-10-20 (366d) |
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 |
|---|---|
| fdrk.dk | Simply.com A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-13 13:56:54 | 991ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-02 19:46:24 | 1002ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-02 05:13:34 | 1302ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-30 19:19:41 | 686ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-25 13:28:13 | 894ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-21 12:33:58 | 869ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-16 18:24:09 shown | 984ms | 3 NS 1 A 1 MX | ⚠️ Bogus |
| 2026-06-16 18:20:57 | 775ms | 3 NS 1 A 1 MX | 🔒 Secure |