21run.dk is a .dk domain served by 2 nameservers (ns1.whirlwind.nl, ns2.whirlwind.nl). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 46.17.9.85 is hosted by Previder B.V. (AS39591) in The Netherlands. Mail is handled by mail.21run.dk, fallback1.whirlwind.nl and 1 more. The zone is not DNSSEC-signed, 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 |
|---|---|---|---|---|---|---|---|
| 46.17.9.85 | 14400s | — | AS39591 | Previder B.V. | 46.17.8.0/22 | 🇳🇱 The Netherlands | Bergen op Zoom |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 14400s | mail.21run.dk | 46.17.9.85 | s2.whirlwind.nl | AS39591 Previder B.V. |
| 20 | 14400s | fallback1.whirlwind.nl | 2a02:2870:c002:2291:46:17:15:72 46.17.15.72 |
— — |
AS60781 LeaseWeb Netherlands B.V. AS60781 LeaseWeb Netherlands B.V. |
| 30 | 14400s | fallback2.whirlwind.nl | 46.17.9.72 | fallback2.whirlwind.nl | AS39591 Previder B.V. |
| www | 46.17.9.85 (AS39591) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| 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 | 2020111001 |
| Primary NS (MNAME) | ns1.whirlwind.nl |
| Responsible (RNAME) | kristof@all4running.be |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 10800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-25 14:59:53 | 1369ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-07-24 06:44:51 shown | 22193ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-07-02 01:23:37 | 1480ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-06-16 12:43:45 | 914ms | 2 NS 1 A 3 MX | 🔓 Insecure |