dansk-efterisolering.dk is a .dk domain served by 3 nameservers (ns4.dns-123.net, ns5.dns-123.net, ns6.dns-123.net). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 51.89.99.87 is hosted by OVH SAS (AS16276) in United Kingdom. Mail is handled by ASPMX.L.GOOGLE.COM, ALT1.ASPMX.L.GOOGLE.COM and 3 more. 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 |
|---|---|---|---|
| ns4.dns-123.net | — | — | — |
| ns5.dns-123.net | — | — | — |
| ns6.dns-123.net | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 51.89.99.87 | — | ns3163776.ip-51-89-99.eu | AS16276 | OVH SAS | 51.89.0.0/16 | 🇬🇧 United Kingdom | London |
| TXT Record |
|---|
| google-site-verification=dNbchRHnl1YLvkd8PH8yX1h291yIpCWw4f47eWno-Gw |
| google-site-verification=KqNtfIKtrLB3cZeXe6sURYMaa1jWEwKj666Kl0cTtks |
| v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqOZ5nj46+KQk+GUZztNJJMZIkw8PRMp9oUSgQCYuGVsZ6v4SM+qDJiDKi7SxHmedoOfKACZ6upFe3CiLr1+7IMDtKJKMI7VGD25wNsLd4DWKfvrFxc/aE/KnU2lCQWfsarnvgWl3+Yztwh+sBAKzBryYXI5YvzdAEH6VQ86D21CMLTa4yLn5DmcI3CiFSl+JGGUOyo9RtNZfArZNd7CRbcQG1i0tufyE/BLspPGkLQzBZ89MgvtHJ9++qvmKHNwVdmSh+UUdB9CPGEZVmeJcw5BrgUXa76hQGFDGzmixIvCsBufk6D1OEgJYI0t5sDYANh+A7ckoaI5scyAfGYpOOwIDAQAB |
| v=spf1 include:spf.mailjet.com ?all |
| Policy | Record (dansk-efterisolering.dk) |
|---|---|
| ?all (neutral) | v=spf1 include:spf.mailjet.com ?all |
| Policy | Record (_dmarc.dansk-efterisolering.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www | 51.89.99.87 (AS16276) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| s1 | s1.domainkey.u53539155.wl156.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u53539155.wl156.sendgrid.net | 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
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2013101686 |
| Primary NS (MNAME) | ns4.dns-123.net |
| Responsible (RNAME) | admin@dns-123.net |
| Refresh | 28800s |
| Retry | 7200s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 300s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 10:57:55 | 843ms | 3 NS 1 A 5 MX | 🔒 Secure |
| 2026-09-28 01:32:21 | 9608ms | 3 NS 1 A 5 MX | 🔒 Secure |
| 2026-08-27 21:54:23 | 2664ms | 3 NS 1 A 5 MX | 🔒 Secure |
| 2026-08-27 00:10:25 | 1109ms | 3 NS 1 A 5 MX | 🔒 Secure |
| 2026-06-24 01:14:40 | 941ms | 3 NS 1 A 5 MX | 🔒 Secure |
| 2026-06-17 00:25:11 shown | 650ms | 3 NS 1 A 5 MX | 🔒 Secure |