f-dk.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by detfagligehus-dk.mx1.comendosystems.com, detfagligehus-dk.mx2.comendosystems.net. 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.
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 43200s | detfagligehus-dk.mx1.comendosystems.com | 192.162.219.255 2a01:77c0:1619:4102:a81b:80d0:e56c:edc0 |
mx41.electric.net gw2-1535.security.comendo.com |
AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. |
| 20 | 43200s | detfagligehus-dk.mx2.comendosystems.net | 192.162.219.155 | mx41.electric.net | AS16509 Amazon.com, Inc. |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | dnsredir.detfagligehus.dk |
| 🔶 Autoconfig | dnsredir.detfagligehus.dk |
| TXT Record |
|---|
| v=spf1 include:spf.mailanyone.net -all |
| Policy | Record (f-dk.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.mailanyone.net -all |
| www CNAME | dnsredir.detfagligehus.dk (all on detfagligehus.dk) ⚠ Dangling: the CNAME target does not exist. If that name can be claimed (an unregistered domain, or a free name on a hosting platform), whoever claims it controls www.f-dk.dk |
| www vs bare domain | Neither resolves f-dk.dk: no address www.f-dk.dk: no address |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 1/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.f-dk.dk | dnsredir.detfagligehus.dk |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2026082401 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-25 08:46:23 | 772ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-24 08:35:54 | 2996ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-16 23:03:00 | 758ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-07 17:00:37 | 1330ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-08-26 01:39:42 shown | 998ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-07-26 04:06:56 | 1532ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-07-21 04:09:02 | 5362ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-24 16:12:23 | 1524ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-21 12:31:21 | 703ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-17 09:09:44 | 787ms | 2 NS 0 A 2 MX | 🔒 Secure |