frederikbulow.dk is a .dk domain served by 4 nameservers (ns1.dnscluster.dk, ns2.dnscluster.dk, ns3.dnscluster.dk and 1 more). It was registered on 8 February 2007 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 213.184.84.10 is hosted by PerfGrid (AS59795) in The Netherlands. Mail is handled by SMTP.GOOGLE.COM. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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.dnscluster.dk | — | — | — |
| ns2.dnscluster.dk | — | — | — |
| ns3.dnscluster.dk | — | — | — |
| ns4.dnscluster.dk | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 213.184.84.10 | — | nlsh05.shared-infra.net | AS59795 | PerfGrid | 213.184.84.0/23 | 🇳🇱 The Netherlands | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a09:3a00:4010::1 | — | — | AS59795 | PerfGrid | 2a09:3a00:4000:0:0:0:0:0/40 | 🇳🇱 The Netherlands | — |
| TXT Record |
|---|
| google-site-verification=ZIZsOKw7DUsjbtlDic9IIPd_JQe3eeoGVF1Eaam7XZ0 |
| v=spf1 +a +mx +include:spf-record.net + include:_spf.google.com ~all |
| Policy | Record (frederikbulow.dk) |
|---|---|
| ~all (soft fail) | v=spf1 +a +mx +include:spf-record.net + include:_spf.google.com ~all |
| Policy | Record (_dmarc.frederikbulow.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1;p=none; |
| www | 213.184.84.10 2a09:3a00:4010::1 (AS59795) (address records, no CNAME) |
| www vs bare domain | Same network frederikbulow.dk: 213.184.84.10 2a09:3a00:4010::1 (AS59795) www.frederikbulow.dk: 213.184.84.10 2a09:3a00:4010::1 (AS59795) |
| Wildcard | Yes: any name under the zone resolves |
| Selector | CNAME | Key |
|---|---|---|
| default | — | RSA · ~1024 bit below 2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
DNS lookups: 5/10 · policy: ~all
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2025031801 |
| Primary NS (MNAME) | ns1.dnscluster.dk |
| Responsible (RNAME) | hostmaster@frederikbulow.dk |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2007-02-08 |
| Expires | 2027-02-28 (131d) |
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 |
|---|---|
| golfsimulatorer.dk | ONE.COM A/S |
| trofædesign.dk | Simply.com A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 03:29:00 | 1245ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-23 22:26:09 | 2621ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-04 22:18:41 | 2560ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-21 11:42:55 | 822ms | 4 NS 1 A 1 MX | ⚠️ Bogus |
| 2026-06-17 09:50:32 shown | 824ms | 4 NS 1 A 1 MX | 🔓 Insecure |