sf-filter.dk is a .dk domain served by 3 nameservers (ns.udag.de, ns.udag.net, ns.udag.org). It was registered on 24 November 2022 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 89.31.143.150 is hosted by united-domains GmbH (AS202108) in Germany. Mail is handled by mx00.udag.de, mx01.udag.de. 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 |
|---|---|---|---|---|---|---|---|
| 89.31.143.150 | 600s | — | AS202108 | united-domains GmbH | 89.31.142.0/23 | 🇩🇪 Germany | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mx00.udag.de | 62.146.106.39 | mx00.udag.de | AS15598 NorthC Deutschland GmbH |
| 20 | 3600s | mx01.udag.de | 62.146.106.40 | mx01.udag.de | AS15598 NorthC Deutschland GmbH |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 89.31.143.150 |
| 🔶 Autoconfig | 89.31.143.150 |
| TXT Record |
|---|
| v=spf1 include:_smtp.udag.de ~all |
| Policy | Record (sf-filter.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_smtp.udag.de ~all |
| www | 89.31.143.150 (AS202108) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
DNS lookups: 1/10 · policy: ~all
No problems found| 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 | 2024122005 |
| Primary NS (MNAME) | ns.udag.de |
| Responsible (RNAME) | hostmaster@united-domains.de |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | united-domains GmbH |
| Registered | 2022-11-24 |
| Expires | 2026-11-23 (29d) |
Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-22 01:29:59 | 876ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-01 01:31:00 | 750ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-27 11:08:10 | 959ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-26 13:04:35 | 1679ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-24 18:08:11 | 705ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-24 10:48:15 | 900ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-22 05:15:53 | 966ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 03:07:01 shown | 725ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-17 19:28:05 | 741ms | 3 NS 1 A 2 MX | 🔓 Insecure |