constructioncenter.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was registered on 11 February 2021 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 144.76.135.224 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by constructioncenter-dk.mail.protection.outlook.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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns1.simply.com | — | — | — |
| ns2.simply.com | — | — | — |
| ns3.simply.com | — | — | — |
| ns4.simply.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 144.76.135.224 | — | static01.bubbleweb.dk | AS24940 | Hetzner Online GmbH | 144.76.0.0/16 | 🇩🇪 Germany | Falkenstein |
| TXT Record |
|---|
| v=spf1 include:spf.officernd.com include:spf.protection.outlook.com -all |
| Policy | Record (constructioncenter.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.officernd.com include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.constructioncenter.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; rua=mailto:dmarcreports@constructioncenter.dk; ruf=mailto:dmarcreports@constructioncenter.dk |
| www CNAME | constructioncenter.dk (all on constructioncenter.dk) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| s1 | s1.domainkey.u4793986.wl237.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u4793986.wl237.sendgrid.net | RSA · ~1024 bit below 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: 6/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026012802 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2021-02-11 |
| Expires | 2027-02-28 (133d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-13 03:56:42 | 1234ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-02 05:53:49 | 700ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-01 05:49:58 | 895ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-28 05:10:06 | 724ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-29 12:11:47 | 827ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-28 11:09:29 | 855ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-26 09:56:18 | 792ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-23 21:09:12 | 912ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-22 13:21:00 | 1434ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 22:05:23 shown | 611ms | 4 NS 1 A 1 MX | 🔒 Secure |