21o.dk is a .dk domain served by 2 nameservers (ns.scannet2.dk, ns2.scannet2.dk). It was already in the .dk zone when our tracking began on 16 June 2026. 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 |
|---|---|---|---|
| ns.scannet2.dk | — | — | — |
| ns2.scannet2.dk | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 78.47.14.199 | — | static.199.14.47.78.clients.your-server.de | AS24940 | — | — | — | Nuremberg |
| TXT Record |
|---|
| d365mktkey=FfxxgZvAnKOLhWOdFAdq6B4ogYEQxn56BqFuVxrYhPEx |
| d365mktkey=VtloxgDJmTagvQ82esYWEBxAwzImcdElzTAeiA8zyWAx |
| www CNAME | 21o.dk (all on 21o.dk) |
| Wildcard | No |
| Denial of existence | NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2025031202 |
| Primary NS (MNAME) | ns.scannet2.dk |
| Responsible (RNAME) | hostmaster@scannet.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 00:06:11 | 406ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-01 12:49:07 | 529ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-25 14:08:21 | 2311ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-16 13:25:39 shown | 6005ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-16 13:12:36 | 900ms | 2 NS 1 A 0 MX | 🔒 Secure |