21.dk is a .dk domain served by 2 nameservers (a.portsdns.se, b.portsdns.net). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.14.90.203 is hosted by Tele2 SWIPnet (AS1257) in Sweden. 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 |
|---|---|---|---|
| a.portsdns.se | — | — | — |
| b.portsdns.net | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 193.14.90.203 | — | redirect.portsit.se | AS1257 | Tele2 SWIPnet | 193.12.0.0/14 | 🇸🇪 Sweden | — |
| TXT Record |
|---|
| v=spf1 -all |
| Policy | Record (21.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| Policy | Record (_dmarc.21.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:65250275ea9c3@dmarc.centerasecurity.com; |
| www | 193.14.90.203 (AS1257) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
DNS lookups: 0/10 · policy: -all
No problems found| 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 | 2024090900 |
| Primary NS (MNAME) | a.portsdns.se |
| Responsible (RNAME) | registry@ports.net |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 28800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-06-23 13:57:47 | 2127ms | 2 NS 1 A 0 MX | 🔓 Insecure |
| 2026-06-23 09:27:41 | 991ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-16 12:53:18 | 1024ms | 2 NS 1 A 0 MX | 🔓 Insecure |
| 2026-06-16 12:50:30 shown | 987ms | 2 NS 1 A 0 MX | 🔓 Insecure |