holmberg.dk is a .dk domain served by 2 nameservers (ns1.123hotel.dk, ns2.123hotel.dk). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 93.191.156.150 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by mx1.onlinemail.io, mx2.onlinemail.io. 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 93.191.156.150 | — | linux264.unoeuro.com | AS48854 | team.blue Denmark A/S | 93.191.152.0/21 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | — | mx1.onlinemail.io | 185.21.42.12 | mx1.onlinemail.io | AS48854 team.blue Denmark A/S |
| 20 | — | mx2.onlinemail.io | 46.36.208.16 | mx2.onlinemail.io | AS48854 team.blue Denmark A/S |
| TXT Record |
|---|
| brevo-code:b81b9bf02c80a797f29d0af25b69e4c6 |
| google-site-verification=mnbbhST7dPtG_U0sluGoQFOeVtaPbYANR9LpEMMXEE0 |
| v=spf1 include:mailgun.org include:spf.curanet.dk ~all |
| Policy | Record (holmberg.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:mailgun.org include:spf.curanet.dk ~all |
| Policy | Record (_dmarc.holmberg.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; rua=mailto:rua@dmarc.brevo.com |
| www | 93.191.156.150 (AS48854) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| 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 |
|---|---|---|
| — | 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: 8/10 · policy: ~all
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2024052402 |
| Primary NS (MNAME) | ns1.123hotel.dk |
| Responsible (RNAME) | hostmaster@curanet.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 13:18:51 | 407ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-01 02:48:47 | 421ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-24 12:36:52 | 467ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-02 21:12:11 | 518ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-01 21:08:57 | 519ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-28 05:41:44 | 625ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-17 13:35:26 shown | 2111ms | 2 NS 1 A 2 MX | 🔒 Secure |