constructionsolution.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 19 May 2025 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by eu-esec-01.heimdalsecurity.com, eu-esec-02.heimdalsecurity.com. The zone is DNSSEC-signed and validates, 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.
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 1 | 0 | 443 | exch.httpscan.dk |
| TXT Record |
|---|
| google-site-verification=UzSm3mpN1am3GzxyAIP7puZBmjc050aBVP7b6wlF_vc |
| v=spf1 include:spf.httpscan.dk -all |
| Policy | Record (constructionsolution.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.httpscan.dk -all |
| Policy | Record (_dmarc.constructionsolution.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:administrator@httpscan.dk; pct=100; |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves constructionsolution.dk: no address www.constructionsolution.dk: no address |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| — | 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: 1/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.eu-esec-01.heimdalsecurity.com | DANE-EE · SPKI · SHA-256 | 2E8933DD6DB99304A5A9D5C4ECDE7B8E… |
| SMTP _25._tcp.eu-esec-02.heimdalsecurity.com | DANE-EE · SPKI · SHA-256 | 2E8933DD6DB99304A5A9D5C4ECDE7B8E… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2026051602 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | ONE.COM A/S |
| Registered | 2025-05-19 |
| Expires | 2027-05-18 (213d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-04 20:52:47 | 572ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-29 20:13:21 | 1152ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-27 19:52:32 | 528ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-18 01:43:14 | 853ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-08-27 08:33:06 | 779ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-08-23 14:20:40 | 4976ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-08-14 16:19:07 | 5948ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-07-17 19:01:33 | 852ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-27 20:52:49 | 662ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-27 05:19:52 | 748ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-21 15:37:08 | 521ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-20 04:29:36 shown | 912ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-19 10:45:23 | 696ms | 2 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-16 22:06:02 | 651ms | 2 NS 0 A 2 MX | 🔒 Secure |