rentabrain.dk is a .dk domain served by 4 nameservers (ns1.nordicway.dk, ns2.nordicway.dk, ns3.nordicway.dk and 1 more). It was registered on 3 October 2025 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 142.132.203.237 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by mail.rentabrain.dk. The zone is not DNSSEC-signed, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 142.132.203.237 | 3600s | cp08.nordicway.dk | AS24940 | Hetzner Online GmbH | 142.132.128.0/17 | 🇩🇪 Germany | Falkenstein |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 3600s | mail.rentabrain.dk | 142.132.203.237 | cp08.nordicway.dk | AS24940 Hetzner Online GmbH |
| TXT Record |
|---|
| v=spf1 +a +mx +ip4:142.132.203.237 include:relay.mailchannels.net ~all |
| Policy | Record (rentabrain.dk) |
|---|---|
| ~all (soft fail) | v=spf1 +a +mx +ip4:142.132.203.237 include:relay.mailchannels.net ~all |
| Policy | Record (_dmarc.rentabrain.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1;p=none;sp=none;adkim=r;aspf=r;pct=100;fo=0;rf=afrf;ri=86400 |
| www | 104.21.48.252 172.67.157.26 2606:4700:3031::6815:30fc 2606:4700:3036::ac43:9d1a (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network rentabrain.dk: 104.21.48.252 172.67.157.26 2606:4700:3031::6815:30fc 2606:4700:3036::ac43:9d1a (AS13335) www.rentabrain.dk: 104.21.48.252 172.67.157.26 2606:4700:3031::6815:30fc 2606:4700:3036::ac43:9d1a (AS13335) |
| Wildcard | No |
DNS lookups: 3/10 · policy: ~all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.rentabrain.dk | UlgyEcid1n4skaY9UPVgsqyqcicGR38Bgm5EB3NUOPM |
| 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 | 2026061807 |
| Primary NS (MNAME) | ns1.nordicway.dk |
| Responsible (RNAME) | server@nordicway.dk |
| Refresh | 3600s |
| Retry | 1800s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2025-10-03 |
| Expires | 2027-10-02 (343d) |
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).
Showing 100 of 735.
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-03 17:55:55 | 408ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-01 05:42:47 | 509ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-05 22:09:26 | 9948ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-04 19:32:33 | 891ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-29 01:49:04 | 847ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-25 07:24:27 | 680ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-24 10:04:56 | 906ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 22:17:32 | 1072ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 19:22:02 | 1382ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-20 14:24:31 | 675ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-19 02:23:16 shown | 4064ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 13:54:24 | 1923ms | 4 NS 1 A 1 MX | 🔓 Insecure |