4rf.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was registered on 8 August 2022 (WHOIS) and 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.
| www | NXDOMAIN |
| www vs bare domain | Neither resolves 4rf.dk: no address www.4rf.dk: no address |
| Wildcard | No |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2022080819 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2022-08-08 |
| Expires | 2028-08-07 (649d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-02 07:04:07 | 304ms | 4 NS 0 A 0 MX | 🔒 Secure |
| 2026-09-19 23:43:16 | 373ms | 4 NS 0 A 0 MX | 🔒 Secure |
| 2026-09-08 14:17:30 | 430ms | 4 NS 0 A 0 MX | 🔒 Secure |
| 2026-09-02 14:59:06 | 966ms | 4 NS 0 A 0 MX | 🔒 Secure |
| 2026-09-02 07:25:40 | 440ms | 4 NS 0 A 0 MX | 🔒 Secure |
| 2026-08-27 21:57:49 shown | 402ms | 4 NS 0 A 0 MX | 🔒 Secure |
| 2026-06-24 14:50:07 | 611ms | 4 NS 0 A 0 MX | 🔒 Secure |
| 2026-06-24 00:27:42 | 654ms | 4 NS 0 A 0 MX | 🔒 Secure |
| 2026-06-16 13:14:10 | 451ms | 4 NS 0 A 0 MX | 🔒 Secure |