btu.dk is a .dk domain served by 2 nameservers (a.portsdns.se, b.portsdns.net). It was registered on 14 August 2002 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.14.90.203 is hosted by Tele2 SWIPnet (AS1257) in Sweden. Mail is handled by mx1.pub.mailpod11-cph3.one.com, mx2.pub.mailpod11-cph3.one.com and 2 more. The zone is DNSSEC-signed but currently fails validation, 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 193.14.90.203 | 28800s | redirect.portsit.se | AS1257 | Tele2 SWIPnet | 193.12.0.0/14 | 🇸🇪 Sweden | Malmö |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mx1.pub.mailpod11-cph3.one.com | 104.37.34.230 | mx1.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| 10 | 3600s | mx2.pub.mailpod11-cph3.one.com | 104.37.34.231 | mx2.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| 10 | 3600s | mx3.pub.mailpod11-cph3.one.com | 104.37.34.232 | mx3.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| 10 | 3600s | mx4.pub.mailpod11-cph3.one.com | 104.37.34.233 | mx4.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| www | 193.14.90.203 (AS1257) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 00E55642F312E05CDB899B1433EDF47F… |
| SMTP _25._tcp.mx2.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 00E55642F312E05CDB899B1433EDF47F… |
| SMTP _25._tcp.mx3.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 00E55642F312E05CDB899B1433EDF47F… |
| SMTP _25._tcp.mx4.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 00E55642F312E05CDB899B1433EDF47F… |
| Check | Result |
|---|---|
| Validation Status | ⚠️ Bogus |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | broken trust chain resolving 'btu.dk/A/IN': 127.0.0.1#53 |
| Field | Value |
|---|---|
| Serial | 2024032700 |
| Primary NS (MNAME) | a.portsdns.se |
| Responsible (RNAME) | registry@ports.net |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 28800s |
| Field | Value |
|---|---|
| Registrar | Abion AB |
| Registered | 2002-08-14 |
| Expires | 2027-09-30 (348d) |
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).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-03 13:00:27 | 790ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-09-23 18:08:56 | 652ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-06-27 08:44:16 | 3426ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-06-24 06:50:53 | 1074ms | 2 NS 1 A 4 MX | ❓ Unknown |
| 2026-06-21 21:23:33 | 1145ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 04:09:05 shown | 1947ms | 2 NS 1 A 4 MX | ⚠️ Bogus |
| 2026-06-16 17:48:50 | 2247ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-06-16 17:45:30 | 4324ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-06-16 17:30:49 | 1560ms | 2 NS 1 A 4 MX | 🔓 Insecure |