kjerulff.dk is a .dk domain served by 3 nameservers (ns1.hostbase.dk, ns2.hostbase.dk, ns3.hostbase.dk). It was registered on 14 January 1998 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.41.135 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by kjerulff-dk.mail.protection.outlook.com. The zone is not DNSSEC-signed, 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.hostbase.dk | 185.103.123.13 | — | AS204171 TD-K A/S |
| ns2.hostbase.dk | 185.103.123.14 | — | AS204171 TD-K A/S |
| ns3.hostbase.dk | 185.150.199.99 | — | AS202914 Adeo Datacenter ApS |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 185.21.41.135 | 3600s | linux24.curanet.dk | AS48854 | team.blue Denmark A/S | 185.21.40.0/22 | 🇩🇰 Denmark | — |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 0 | 0 | 443 | email.asp1.keyloop.io |
| TXT Record |
|---|
| v=msv1 t=DB06FD85-AC16-4255-A793-FF6FA1CEDCD9 |
| v=spf1 include:_spf.keyloop.io include:spf.curanet.dk include:mailgun.org -all |
| Policy | Record (kjerulff.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:_spf.keyloop.io include:spf.curanet.dk include:mailgun.org -all |
| Policy | Record (_dmarc.kjerulff.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www CNAME | kjerulff.dk (all on kjerulff.dk) → 185.21.41.135 (AS48854) |
| www vs bare domain | Same network |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| s1 | s1.domainkey.u21071528.wl029.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u21071528.wl029.sendgrid.net | 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: 13/10 · 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 | 40 |
| Primary NS (MNAME) | dns01.hostbase.local |
| Responsible (RNAME) | hostmaster@hostbase.local |
| Refresh | 900s |
| Retry | 600s |
| Expire | 86400s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 1998-01-14 |
| Expires | 2031-03-31 (1626d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 17:39:00 | 3142ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-02 09:52:23 shown | 4406ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 14:01:44 | 4582ms | 3 NS 1 A 1 MX | 🔓 Insecure |