gnub.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was registered on 30 July 2005 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 94.231.103.100 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by hackeruniverse.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 |
|---|---|---|---|---|---|---|---|
| 94.231.103.100 | — | dnsforward.simply.com | AS48854 | team.blue Denmark A/S | 94.231.96.0/20 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | — | hackeruniverse.dk | 2a01:488:66:1000:5c33:957c:0:1 92.51.149.124 |
hackeruniverse.dk hackeruniverse.dk |
AS20773 Host Europe GmbH AS8972 Host Europe GmbH |
| TXT Record |
|---|
| v=spf1 mx -all |
| Policy | Record (gnub.dk) |
|---|---|
| -all (hard fail) | v=spf1 mx -all |
| Policy | Record (_dmarc.gnub.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; pct=100; |
| www | 94.231.103.100 (AS48854) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 1/10 · 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 | 2022033000 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2005-07-30 |
| Expires | 2030-07-31 (1382d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 22:44:24 | 2614ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-02 12:45:36 | 565ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-28 05:00:19 | 700ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-29 13:26:05 | 786ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-25 19:02:38 | 866ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 10:00:22 shown | 720ms | 4 NS 1 A 1 MX | 🔒 Secure |