seitz.dk is a .dk domain served by 3 nameservers (root-dns.netcup.net, second-dns.netcup.net, third-dns.netcup.net). It was registered on 21 January 2015 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 152.53.125.183 is hosted by netcup GmbH (AS197540) in Germany. Mail is handled by tls.jakobsack.de. The zone is DNSSEC-signed but currently fails validation, publishes a DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 152.53.125.183 | — | v220250223038311687.nicesrv.de | AS197540 | netcup GmbH | 152.53.112.0/20 | 🇩🇪 Germany | Karlsruhe |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | — | tls.jakobsack.de | 152.53.125.183 2a0a:4cc0:c0:5239::1337 |
v220250223038311687.nicesrv.de jakobsack.de |
AS197540 netcup GmbH AS197540 netcup GmbH |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a0a:4cc0:c0:5239::1337 | — | jakobsack.de | AS197540 | netcup GmbH | 2a0a:4cc0:c0:0:0:0:0:0/43 | 🇩🇪 Germany | Nuremberg |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _imap._tcp | 0 | 1 | 143 | seitz.dk |
| _imaps._tcp | 0 | 1 | 993 | seitz.dk |
| TXT Record |
|---|
| v=spf1 +mx include:authsmtp.com ra=postmaster -all |
| Policy | Record (seitz.dk) |
|---|---|
| -all (hard fail) | v=spf1 +mx include:authsmtp.com ra=postmaster -all |
| Policy | Record (_dmarc.seitz.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; rua=mailto:dmarc@server.jakobsack.de; ruf=mailto:dmarc@server.jakobsack.de |
| Status | Report address (rua) |
|---|---|
| ✓ Enabled | mailto:tls@server.jakobsack.de |
| www CNAME | seitz.dk (all on seitz.dk) |
| www vs bare domain | Same network seitz.dk: 152.53.125.183 2a0a:4cc0:c0:5239::1337 (AS197540) www.seitz.dk: 152.53.125.183 2a0a:4cc0:c0:5239::1337 (AS197540) |
| Wildcard | No |
DNS lookups: 2/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | ⚠️ Bogus |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | broken trust chain resolving 'seitz.dk/A/IN': 127.0.0.1#53 |
| Field | Value |
|---|---|
| Serial | 2025101227 |
| Primary NS (MNAME) | root-dns.netcup.net |
| Responsible (RNAME) | dnsadmin@netcup.net |
| Refresh | 28800s |
| Retry | 7200s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 60s |
| Field | Value |
|---|---|
| Registrar | ASCIO TECHNOLOGIES, CORP. DANMARK - FILIAL AF ASCIO TECHNOLOGIES, CORP. CANADA |
| Registered | 2015-01-21 |
| Expires | 2027-01-31 (103d) |
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 |
|---|---|---|---|
| 2026-10-03 03:52:08 | 1572ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-26 10:26:20 | 2253ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-27 23:34:30 | 11262ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-26 10:38:03 | 3018ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-20 15:07:56 | 1532ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-18 06:37:51 shown | 2511ms | 3 NS 1 A 1 MX | ⚠️ Bogus |