rs4.dk is a .dk domain served by 2 nameservers (ns1.dns.services, ns2.dns.services). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 81.7.163.195 is hosted by Sentia Denmark A/S (AS47292) in Denmark. Mail is handled by mail.rs4.dk. The zone is not DNSSEC-signed, has no DMARC policy and has no IPv6 address. Below are all of its DNS records from our latest 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 |
|---|---|---|---|---|---|---|---|
| 81.7.163.195 | 3600s | — | AS47292 | Sentia Denmark A/S | 81.7.160.0/21 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mail.rs4.dk | 81.7.132.82 | safeweb.dk | AS47292 Sentia Denmark A/S |
| www | 81.7.163.195 (AS47292) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2022072802 |
| Primary NS (MNAME) | ns1.dns.services |
| Responsible (RNAME) | hostmaster@comasys.dk |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 2419000s |
| Minimum (neg-cache TTL) | 43200s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-03 21:42:20 shown | 496ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-30 05:53:47 | 487ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-16 21:29:43 | 1082ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-07 04:20:16 | 544ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-29 09:22:33 | 4720ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-02 10:04:15 | 774ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-18 04:54:18 | 3746ms | 2 NS 1 A 1 MX | 🔓 Insecure |