0day.dk is a .dk domain served by 2 nameservers (brianna.ns.cloudflare.com, cesar.ns.cloudflare.com). It was registered on 6 August 2001 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 91.226.144.146 is hosted by Netnoerden ApS (AS216275) in Denmark. Mail is handled by pmg9.hostedby.dk, pmg.hostedby.dk. 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 |
|---|---|---|---|---|---|---|---|
| 91.226.144.146 | 300s | — | AS216275 | Netnoerden ApS | 91.226.144.0/23 | 🇩🇰 Denmark | Copenhagen |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 5 | 300s | pmg9.hostedby.dk | 91.229.203.190 | pmg9.hostedby.dk | AS216275 Netnoerden ApS |
| 10 | 300s | pmg.hostedby.dk | 91.229.203.190 | pmg9.hostedby.dk | AS216275 Netnoerden ApS |
| TXT Record |
|---|
| v=spf1 include:hostedby.dk -all |
| Policy | Record (0day.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:hostedby.dk -all |
| Policy | Record (_dmarc.0day.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; rua=mailto:60ab3b44fca04ac39d72225202d6e19b@dmarc-reports.cloudflare.net |
| www CNAME | 0day.dk (all on 0day.dk) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 5/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2414630298 |
| Primary NS (MNAME) | brianna.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | dns.services ApS |
| Registered | 2001-08-06 |
| Expires | 2027-07-31 (287d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 08:12:59 | 975ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-06 10:49:28 | 2407ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-04 10:09:12 | 1984ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-30 09:57:31 shown | 4499ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-27 01:12:07 | 4544ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-14 15:24:26 | 3657ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-07 15:43:41 | 2400ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-31 07:36:32 | 3397ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-19 04:42:39 | 5984ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-07 22:28:37 | 1341ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-26 15:09:20 | 3294ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-01 20:05:04 | 1102ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-26 03:38:31 | 817ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-23 23:42:15 | 938ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-16 12:33:43 | 864ms | 2 NS 1 A 2 MX | 🔒 Secure |