fu.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was registered on 21 March 1996 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 195.215.86.151 is hosted by TDC Holding A/S (AS3292) in Denmark. 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 195.215.86.151 | 3600s | — | AS3292 | TDC Holding A/S | 195.215.0.0/16 | 🇩🇰 Denmark | Brøndby Strand |
| www CNAME | web31.jcdhotel.dk (all on jcdhotel.dk) → 195.215.86.151 (AS3292) |
| www vs bare domain | Same network |
| 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 | 2026062201 |
| Primary NS (MNAME) | ns1.curanet.dk |
| Responsible (RNAME) | hostmaster@curanet.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Field | Value |
|---|---|
| Registrar | CURANET A/S |
| Registered | 1996-03-21 |
| Expires | 2027-03-31 (163d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-27 07:13:06 | 470ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-26 20:58:57 | 824ms | 2 NS 4 A 0 MX | 🔒 Secure |
| 2026-09-16 17:41:28 shown | 531ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-11 08:20:37 | 825ms | 2 NS 4 A 0 MX | 🔒 Secure |
| 2026-06-25 02:23:00 | 360ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-17 10:02:56 | 4316ms | 2 NS 1 A 0 MX | 🔓 Insecure |