skoleduel.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 7 December 2005 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by .. 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 |
|---|---|---|---|---|---|---|---|
| 82.143.192.177 | 600s | — | — | — | — | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 300s | . Null MX — domain accepts no email (RFC 7505) | |||
| www | Address record (no CNAME) |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| 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 | 2026100101 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2005-12-07 |
| Expires | 2030-12-31 (1550d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-02 22:50:21 | 442ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-01 22:49:41 shown | 533ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-19 13:06:25 | 821ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-27 21:35:54 | 673ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-21 15:57:38 | 5089ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-27 20:38:34 | 1419ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-17 13:58:09 | 2418ms | 2 NS 1 A 4 MX | 🔒 Secure |