nbook.dk is a .dk domain served by 2 nameservers (noel.ns.cloudflare.com, ulla.ns.cloudflare.com). It was registered on 12 August 2020 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.72.164 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by webhotel26.webhosting.dk. The zone is not DNSSEC-signed, has no 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 |
|---|---|---|---|---|---|---|---|
| 104.21.72.164 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.153.38 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | webhotel26.webhosting.dk | 157.250.160.46 | webhotel26.webhosting.dk | AS3342 Cibicom A/S |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3033::6815:48a4 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3034::ac43:9926 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.72.164,172.67.153.38 ech=AEX+DQBBOAAgACCoHv6+0vAqMmPAoHuYGDp/hbTGrX5q1kGCAuTjYfMZcwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::6815:48a4,2606:4700:3034::ac43:9926 |
| www | 104.21.72.164 172.67.153.38 2606:4700:3033::6815:48a4 2606:4700:3034::ac43:9926 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.webhotel26.webhosting.dk | DANE-TA · SPKI · SHA-256 | FA4EFC305AA17A4FEEE8B29B2DAA8847… |
| SMTP _25._tcp.webhotel26.webhosting.dk | DANE-EE · SPKI · SHA-256 | FA4EFC305AA17A4FEEE8B29B2DAA8847… |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2411470732 |
| Primary NS (MNAME) | noel.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2020-08-12 |
| Expires | 2027-07-31 (286d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 00:06:22 | 457ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-10-05 05:25:16 | 532ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-30 04:42:48 | 543ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-08 19:02:27 | 735ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-25 11:15:45 shown | 630ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-07 23:01:36 | 1676ms | 2 NS 2 A 1 MX | ❓ Unknown |
| 2026-06-20 14:33:21 | 601ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-20 04:58:29 | 525ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-18 03:17:37 | 754ms | 2 NS 2 A 1 MX | 🔓 Insecure |