luder.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 16 March 2004 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.106.166.52 is hosted by Fiberby ApS (AS42541) in Denmark. Mail is handled by mail.luder.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 |
|---|---|---|---|---|---|---|---|
| 193.106.166.52 | 43200s | 193-106-166-52.ip4.fiberby.net | AS42541 | Fiberby ApS | 193.106.164.0/22 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 43200s | mail.luder.dk | 193.106.166.52 | 193-106-166-52.ip4.fiberby.net | AS42541 Fiberby ApS |
| TXT Record |
|---|
| v=DKIM1;k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDcViGVGgD6VBirIvpP5l10YPkta0yoq4YY7OVECjMsIq05PmJhImUq9ijUrP7ol1xk5fIJ4UE32RL/hhKMA4x+tD15BNZUmJ6YXI1vq4ypnRWH0laJrm3HWPzSyLx4AZSuN7NMFFTyEks6zcIifbB882BA9yQdQJimMBRFckSc3QIDAQAB |
| v=spf1 mx ip4:178.63.40.215 mx:alt1.aspmx.l.google.com mx:alt2.aspmx.l.google.com mx:aspmx.l.google.com mx:aspmx2.googlemail.com mx:aspmx3.googlemail.com ~all |
| Policy | Record (luder.dk) |
|---|---|
| ~all (soft fail) | v=spf1 mx ip4:178.63.40.215 mx:alt1.aspmx.l.google.com mx:alt2.aspmx.l.google.com mx:aspmx.l.google.com mx:aspmx2.googlemail.com mx:aspmx3.googlemail.com ~all |
| www CNAME | luder.dk (all on luder.dk) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| default | luder.dk | RSA Invalid key data — receivers can't verify signatures |
| s1 | luder.dk | RSA Invalid key data — receivers can't verify signatures |
| s2 | luder.dk | RSA Invalid key data — receivers can't verify signatures |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
DNS lookups: 6/10 · policy: ~all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026030701 |
| 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 | 2004-03-16 |
| Expires | 2030-03-31 (1255d) |
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).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 09:24:15 | 639ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 19:11:22 | 1029ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-24 17:47:27 | 754ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-08 12:41:12 | 767ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-26 17:03:56 shown | 1806ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-25 00:41:40 | 757ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-18 01:13:09 | 1115ms | 2 NS 1 A 1 MX | 🔒 Secure |