0x90.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 91.98.180.249 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by mail.protonmail.ch, mailsec.protonmail.ch. The zone is DNSSEC-signed and validates, publishes a DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 91.98.180.249 | 3600s | ra.0x90.dk | AS24940 | Hetzner Online GmbH | 91.98.0.0/15 | 🇩🇪 Germany | Falkenstein |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a01:4f8:2210:24c3::1 | 3600s | ra.0x90.dk | AS24940 | Hetzner Online GmbH | 2a01:4f8:0:0:0:0:0:0/31 | 🇩🇪 Germany | Falkenstein |
| TXT Record |
|---|
| protonmail-verification=e1551aafc222999924d0430fff3075ea94e683b5 |
| v=spf1 include:_spf.protonmail.ch -all |
| Policy | Record (0x90.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:_spf.protonmail.ch -all |
| Policy | Record (_dmarc.0x90.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; fo=1; rua=mailto:dmarc@0x90.dk |
| Check | Result |
|---|---|
| Status | 🔒 Enforce |
| TXT record (_mta-sts) | ✓ Found |
| HTTPS policy | ✓ Valid |
| Mode | enforce |
| Policy ID | 20251201141500 |
| max_age | 2678400s |
| Policy MX | mail.protonmail.ch, mailsec.protonmail.ch |
| Status | Report address (rua) |
|---|---|
| ✓ Enabled | mailto:tls-report@0x90.dk |
| Flags | Tag | Value |
|---|---|---|
| 0 | issue | letsencrypt.org |
| www CNAME | 0x90.dk (all on 0x90.dk) |
| www vs bare domain | Same network 0x90.dk: 138.201.126.116 2a01:4f8:172:29a5::2 (AS24940) www.0x90.dk: 138.201.126.116 2a01:4f8:172:29a5::2 (AS24940) |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 2/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026071701 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 23:20:15 | 804ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-23 21:22:17 | 1161ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-12 20:30:00 | 1469ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-16 07:02:15 | 17549ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-12 07:48:35 | 1234ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-18 04:35:26 shown | 2420ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-15 19:10:43 | 1215ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-25 03:26:28 | 687ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-23 00:51:12 | 1133ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-16 12:33:48 | 1658ms | 2 NS 1 A 2 MX | 🔒 Secure |