ubook.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 12 October 2023 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 209.250.227.6 is hosted by The Constant Company, LLC (AS20473) in United Kingdom. The zone is DNSSEC-signed and validates, has no 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 |
|---|---|---|---|---|---|---|---|
| 209.250.227.6 | — | 209.250.227.6.vultrusercontent.com | AS20473 | The Constant Company, LLC | 209.250.224.0/19 | 🇬🇧 United Kingdom | Canary Wharf |
| www | Address record (no CNAME) |
| 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 |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2023110400 |
| 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 | Simply.com A/S |
| Registered | 2023-10-12 |
| Expires | 2026-10-11 (expired) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-21 23:28:21 | 101ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-20 15:01:05 | 335ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-19 06:09:22 | 350ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-18 05:39:52 | 118ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-17 05:30:13 | 252ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-16 05:18:12 | 209ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-14 23:11:57 | 225ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-13 21:56:09 | 119ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-12 21:21:56 | 795ms | 1 NS 0 A 0 MX | ❓ Unknown |
| 2026-10-02 12:18:00 | 558ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-30 12:16:07 | 508ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-30 02:14:12 | 386ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-27 08:12:48 | 775ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-26 17:13:20 | 937ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-24 07:06:25 | 982ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-23 23:58:52 | 3016ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-23 03:25:19 | 1174ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 11:50:56 shown | 804ms | 3 NS 1 A 0 MX | 🔒 Secure |