one-system.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 7 December 2010 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 91.102.90.129 is hosted by Sentia Denmark A/S (AS47292) in Denmark. Mail is handled by frontend01.mailsafe.dk, frontend02.mailsafe.dk. 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 |
|---|---|---|---|---|---|---|---|
| 91.102.90.129 | 3600s | — | AS47292 | Sentia Denmark A/S | 91.102.88.0/21 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | frontend01.mailsafe.dk | 89.104.206.4 | recursor41.electric.net | AS16509 Amazon.com, Inc. |
| 20 | 3600s | frontend02.mailsafe.dk | 192.162.217.4 | jason-test.vipre-europe.co.uk | — |
| www CNAME | one-system.dk (all on one-system.dk) → 91.102.90.129 (AS47292) |
| www vs bare domain | Same network |
| 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 | 2026032401 |
| 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 | 2010-12-07 |
| Expires | 2026-12-31 (75d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-06 01:43:58 | 848ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-01 01:17:31 | 1792ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-23 23:23:26 | 785ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-18 12:45:20 | 815ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-09 20:47:28 shown | 757ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-26 18:45:49 | 613ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-23 08:05:24 | 5155ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-25 07:56:17 | 5396ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-03 00:03:57 | 2513ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-21 12:22:19 | 1016ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-20 18:17:46 | 585ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-18 04:50:33 | 909ms | 2 NS 1 A 2 MX | 🔒 Secure |