21cf.dk is a .dk domain served by 2 nameservers (dns1.cscdns.net, dns2.cscdns.net). It was registered on 21 June 2013 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. The zone is not DNSSEC-signed, 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 |
|---|---|---|---|
| dns1.cscdns.net | — | — | — |
| dns2.cscdns.net | — | — | — |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves 21cf.dk: no address www.21cf.dk: no address |
| Wildcard | No |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2020031802 |
| Primary NS (MNAME) | dns1.cscdns.net |
| Responsible (RNAME) | hostmaster@cscdns.net |
| Refresh | 28800s |
| Retry | 7200s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 14400s |
| Field | Value |
|---|---|
| Registrar | CSC Digital Brand Service, Inc |
| Registered | 2013-06-21 |
| Expires | 2027-06-30 (255d) |
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).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 14:28:13 | 535ms | 2 NS 0 A 0 MX | 🔓 Insecure |
| 2026-09-21 19:05:50 | 546ms | 2 NS 0 A 0 MX | 🔓 Insecure |
| 2026-08-27 04:52:05 | 804ms | 2 NS 0 A 0 MX | 🔓 Insecure |
| 2026-06-23 18:23:41 | 946ms | 2 NS 0 A 0 MX | 🔓 Insecure |
| 2026-06-23 17:41:58 | 1173ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-16 12:43:07 shown | 439ms | 2 NS 0 A 0 MX | 🔓 Insecure |