bykoustrup.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 34.51.215.156 is hosted by Google LLC (AS396982) in Sweden. Mail is handled by mx1.pub.mailpod9-cph3.one.com, mx2.pub.mailpod9-cph3.one.com and 2 more. The zone is DNSSEC-signed but currently fails validation, 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 |
|---|---|---|---|---|---|---|---|
| 34.51.215.156 | 3600s | 156.215.51.34.bc.googleusercontent.com | AS396982 | Google LLC | 34.32.0.0/11 | 🇸🇪 Sweden | Stockholm |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 10800s | mx1.pub.mailpod9-cph3.one.com | 185.164.14.118 | mx1.pub.mailpod9-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx2.pub.mailpod9-cph3.one.com | 185.164.14.119 | mx2.pub.mailpod9-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx3.pub.mailpod9-cph3.one.com | 185.164.14.120 | mx3.pub.mailpod9-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx4.pub.mailpod9-cph3.one.com | 185.164.14.124 | mx4.pub.mailpod9-cph3.one.com | AS51468 One.com A/S |
| Policy | Record (_dmarc.bykoustrup.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www | 34.51.215.156 (AS396982) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.pub.mailpod9-cph3.one.com | DANE-EE · SPKI · SHA-256 | 5D2162F5CED0ACD2C3D63E5582045A6C… |
| SMTP _25._tcp.mx2.pub.mailpod9-cph3.one.com | DANE-EE · SPKI · SHA-256 | 5D2162F5CED0ACD2C3D63E5582045A6C… |
| SMTP _25._tcp.mx3.pub.mailpod9-cph3.one.com | DANE-EE · SPKI · SHA-256 | 5D2162F5CED0ACD2C3D63E5582045A6C… |
| SMTP _25._tcp.mx4.pub.mailpod9-cph3.one.com | DANE-EE · SPKI · SHA-256 | 5D2162F5CED0ACD2C3D63E5582045A6C… |
| Check | Result |
|---|---|
| Validation Status | ⚠️ Bogus |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | broken trust chain resolving 'bykoustrup.dk/A/IN': 127.0.0.1#53 |
| Field | Value |
|---|---|
| Serial | 2026061101 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 00:26:29 | 849ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-30 14:29:20 | 527ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-13 15:47:25 | 4745ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-28 08:04:58 | 1154ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-22 14:44:48 | 4178ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-13 02:20:11 | 1122ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-11 22:10:04 | 1291ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-10 13:18:55 | 4884ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-28 11:01:36 | 677ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-21 13:51:27 shown | 748ms | 2 NS 1 A 4 MX | ⚠️ Bogus |
| 2026-06-16 18:22:58 | 644ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-16 18:20:43 | 942ms | 2 NS 1 A 4 MX | 🔒 Secure |