claus-c.dk is a .dk domain served by 2 nameservers (ns1.blackhost.dk, ns2.blackhost.dk). It was registered on 22 October 2003 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 157.90.215.201 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by claus-c.dk, smx.blackhost.dk. 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns1.blackhost.dk | 95.179.132.153 | ns1.fairhost.net | AS20473 The Constant Company, LLC |
| ns2.blackhost.dk | 108.61.173.235 | ns2.blackhost.dk | AS20473 The Constant Company, LLC |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 157.90.215.201 | 600s | cp10.fairhost.net | AS24940 | Hetzner Online GmbH | 157.90.0.0/16 | 🇩🇪 Germany | Falkenstein |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 600s | claus-c.dk | 157.90.215.201 | cp10.fairhost.net | AS24940 Hetzner Online GmbH |
| 100 | 600s | smx.blackhost.dk | 108.61.196.96 | smx.blackhost.dk | AS20473 The Constant Company, LLC |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 0 | 0 | 443 | cpanelemaildiscovery.cpanel.net |
| TXT Record |
|---|
| v=spf1 +a +mx +ip4:157.90.215.201 +ip4:148.251.117.38 +include:spf1.mailchannels.net +include:relay.mailchannels.net ~all |
| Policy | Record (claus-c.dk) |
|---|---|
| ~all (soft fail) | v=spf1 +a +mx +ip4:157.90.215.201 +ip4:148.251.117.38 +include:spf1.mailchannels.net +include:relay.mailchannels.net ~all |
| www | 157.90.215.201 (AS24940) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| default | — | RSA · ~2048 bit |
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: 4/10 · policy: ~all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.claus-c.dk | kyfWUdIA3o1y67sJ580QL4R23YtHKz-d9Mxb2KxF2X0 |
| 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 | 2026072800 |
| Primary NS (MNAME) | ns1.blackhost.dk |
| Responsible (RNAME) | hostmaster@blackhost.dk |
| Refresh | 3600s |
| Retry | 1800s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2003-10-22 |
| Expires | 2026-10-31 (14d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-03 18:00:55 | 2798ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-29 17:38:47 | 1270ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-16 11:34:31 | 10182ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-27 10:21:55 | 1052ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-06 10:12:54 | 1251ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-07-30 02:54:11 shown | 9833ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-27 16:24:26 | 2121ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-16 21:06:09 | 719ms | 2 NS 1 A 2 MX | 🔓 Insecure |