opensign.dk is a .dk domain served by 2 nameservers (ns1.alco.dk, ns2.alco.dk). It was registered on 18 November 2025 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 37.27.217.89 is hosted by Hetzner Online GmbH (AS24940) in Finland. Mail is handled by mail.opensign.dk. The zone is not DNSSEC-signed, has no DMARC policy and has no IPv6 address. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns1.alco.dk | 46.225.229.1 | ns1.alco.dk | AS24940 Hetzner Online GmbH |
| ns2.alco.dk | 89.167.94.156 | ns2.alco.dk | AS24940 Hetzner Online GmbH |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 37.27.217.89 | 3600s | static.89.217.27.37.clients.your-server.de | AS24940 | Hetzner Online GmbH | 37.27.0.0/16 | 🇫🇮 Finland | Helsinki |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 3600s | mail.opensign.dk | 65.21.55.96 | hosting-3.alco.company | AS24940 Hetzner Online GmbH |
| TXT Record |
|---|
| v=spf1 mx a -all |
| Policy | Record (opensign.dk) |
|---|---|
| -all (hard fail) | v=spf1 mx a -all |
| www | NXDOMAIN |
| www vs bare domain | www does not resolve (all like this) |
| Wildcard | No |
DNS lookups: 2/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2025121901 |
| Primary NS (MNAME) | ns1.alco.dk |
| Responsible (RNAME) | hostmaster@opensign.dk |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | CURANET A/S |
| Registered | 2025-11-18 |
| Expires | 2026-11-17 (27d) |
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 |
|---|---|---|---|
| 2026-09-29 18:06:17 shown | 626ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-27 18:04:02 | 9476ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-27 15:21:28 | 791ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-25 17:58:33 | 954ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 13:10:59 | 1626ms | 2 NS 1 A 1 MX | 🔓 Insecure |