maildefender.dk is a .dk domain served by 4 nameservers (ns-cloud-d1.googledomains.com, ns-cloud-d2.googledomains.com, ns-cloud-d3.googledomains.com and 1 more). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 116.203.43.243 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by mx.mailfirewall.dk. The zone is DNSSEC-signed and validates, 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 116.203.43.243 | 298s | static.243.43.203.116.clients.your-server.de | AS24940 | Hetzner Online GmbH | 116.202.0.0/15 | 🇩🇪 Germany | Nuremberg |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 86400s | mx.mailfirewall.dk | 89.188.78.64 94.231.106.10 94.231.106.12 |
node3.spamfilter.io node1.spamfilter.io node2.spamfilter.io |
AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S |
| TXT Record |
|---|
| v=spf1 -all |
| Policy | Record (maildefender.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| Policy | Record (_dmarc.maildefender.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:btpv5zey@ag.dmarcian.com; ruf=mailto:btpv5zey@fr.dmarcian.com; |
| www | NXDOMAIN |
| www vs bare domain | www does not resolve (all like this) |
| Wildcard | No |
| Denial of existence | NSEC3 · 1 iteration · 8-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 0 CDNSKEY |
DNS lookups: 0/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 1 |
| Primary NS (MNAME) | ns-cloud-d1.googledomains.com |
| Responsible (RNAME) | cloud-dns-hostmaster@google.com |
| Refresh | 21600s |
| Retry | 3600s |
| Expire | 259200s |
| Minimum (neg-cache TTL) | 300s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-02 16:40:48 | 1517ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 16:04:25 | 662ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-26 01:14:32 | 2755ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-14 01:47:19 shown | 2435ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-26 23:42:52 | 2566ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-28 10:50:21 | 1167ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 14:55:14 | 2332ms | 4 NS 1 A 1 MX | 🔒 Secure |