resenborghus.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.40.15 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by scanner01.resennet.dk, scanner02.resennet.dk and 1 more. The zone is DNSSEC-signed and validates, 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 185.21.40.15 | 3600s | vm1292.enterprisecloud.nu | AS48854 | team.blue Denmark A/S | 185.21.40.0/22 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | scanner01.resennet.dk | 193.32.65.29 | scanner01.resennet.dk | AS3292 TDC Holding A/S |
| 20 | 3600s | scanner02.resennet.dk | 193.32.65.29 | scanner01.resennet.dk | AS3292 TDC Holding A/S |
| 30 | 3600s | scanner03.resennet.dk | 193.32.65.29 | scanner01.resennet.dk | AS3292 TDC Holding A/S |
| TXT Record |
|---|
| v=spf1 +mx +a +ip4:5.9.143.154 +include:spf.dominoevers.dk include:_spf.resennet.dk include:spf.curanet.dk include:web.shared.mysmtp.com -all |
| Policy | Record (resenborghus.dk) |
|---|---|
| -all (hard fail) | v=spf1 +mx +a +ip4:5.9.143.154 +include:spf.dominoevers.dk include:_spf.resennet.dk include:spf.curanet.dk include:web.shared.mysmtp.com -all |
| www | 185.21.40.15 (AS48854) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| default | — | 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: 13/10 · policy: -all
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2025090101 |
| Primary NS (MNAME) | ns1.curanet.dk |
| Responsible (RNAME) | hostmaster@curanet.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 06:33:11 shown | 446ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-22 14:50:44 | 553ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-28 03:01:20 | 827ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-27 01:42:26 | 566ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-23 04:40:20 | 1245ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-23 01:43:22 | 922ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 12:20:51 | 898ms | 2 NS 1 A 3 MX | 🔒 Secure |