quercus.dk is a .dk domain served by 2 nameservers (ns1.vultr.com, ns2.vultr.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 78.141.223.166 is hosted by The Constant Company, LLC (AS20473) in The Netherlands. Mail is handled by quercus.dk. The zone is not DNSSEC-signed, 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 |
|---|---|---|---|---|---|---|---|
| 78.141.223.166 | 300s | mail.hobit.dk | AS20473 | The Constant Company, LLC | 78.141.192.0/18 | 🇳🇱 The Netherlands | Amsterdam |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | quercus.dk | 78.141.223.166 | mail.hobit.dk | AS20473 The Constant Company, LLC |
| www CNAME | quercus.dk (all on quercus.dk) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.quercus.dk | quercus.dk |
| 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 | 0 |
| Primary NS (MNAME) | ns1.vultr.com |
| Responsible (RNAME) | dnsadm@choopa.com |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 3600s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-07 19:00:07 | 1064ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-30 10:06:48 | 1074ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-27 16:47:09 | 2832ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-16 19:52:57 shown | 1750ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-22 22:27:39 | 908ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-18 02:06:21 | 3222ms | 2 NS 1 A 1 MX | 🔓 Insecure |