byruby.dk is a .dk domain served by 2 nameservers (ns1.concrete5danmark.dk, ns2.concrete5danmark.dk). It was registered on 5 February 2020 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 138.201.255.81 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by byruby.dk. The zone is not DNSSEC-signed, has no 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns1.concrete5danmark.dk | — | — | — |
| ns2.concrete5danmark.dk | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 138.201.255.81 | — | server.concrete5danmark.dk | AS24940 | Hetzner Online GmbH | 138.201.0.0/16 | 🇩🇪 Germany | Falkenstein |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | — | byruby.dk | 138.201.255.81 | server.concrete5danmark.dk | AS24940 Hetzner Online GmbH |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a01:4f8:173:2652::1 | — | — | AS24940 | Hetzner Online GmbH | 2a01:4f8:0:0:0:0:0:0/31 | 🇩🇪 Germany | Falkenstein |
| TXT Record |
|---|
| v=spf1 ip4:138.201.255.81 include:spf.azehosting.net +a +mx +ip4:138.201.130.182 +include:relay.mailchannels.net ~all |
| Policy | Record (byruby.dk) |
|---|---|
| ~all (soft fail) | v=spf1 ip4:138.201.255.81 include:spf.azehosting.net +a +mx +ip4:138.201.130.182 +include:relay.mailchannels.net ~all |
| www CNAME | byruby.dk (all on byruby.dk) |
| www vs bare domain | Same network byruby.dk: 138.201.255.81 2a01:4f8:173:2652::1 (AS24940) www.byruby.dk: 138.201.255.81 2a01:4f8:173:2652::1 (AS24940) |
| 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: 5/10 · policy: ~all
No problems found| 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 | 2026061303 |
| Primary NS (MNAME) | ns1.concrete5danmark.dk |
| Responsible (RNAME) | server-admin@azehosting.net |
| Refresh | 3600s |
| Retry | 1800s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2020-02-05 |
| Expires | 2027-02-28 (133d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-13 17:53:54 | 588ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-26 00:05:34 | 12283ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-27 13:13:03 | 6738ms | 2 NS 1 A 0 MX | 🔓 Insecure |
| 2026-08-13 19:36:29 | 4578ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-29 05:48:46 | 9842ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-28 03:18:17 | 818ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-26 02:27:28 | 6581ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-25 02:11:24 | 883ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-24 02:04:11 | 16726ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-21 09:52:01 | 901ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-19 14:47:20 | 830ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-18 12:40:13 | 847ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-16 02:22:50 | 10022ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-14 21:12:05 | 979ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-06 01:25:02 | 7173ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-26 16:34:07 | 1090ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-20 07:52:49 | 648ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-19 09:30:10 | 827ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-16 18:25:58 shown | 687ms | 2 NS 1 A 1 MX | 🔓 Insecure |