skybooks.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 10 June 2011 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 77.111.240.137 is hosted by One.com A/S (AS51468) in Denmark. Mail is handled by mx1.pub.mailpod11-cph3.one.com, mx2.pub.mailpod11-cph3.one.com and 2 more. 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 |
|---|---|---|---|---|---|---|---|
| 77.111.240.137 | 3600s | webcluster10.webpod11-cph3.one.com | AS51468 | One.com A/S | 77.111.240.0/22 | 🇩🇰 Denmark | Copenhagen |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 10800s | mx1.pub.mailpod11-cph3.one.com | 104.37.34.230 | mx1.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx2.pub.mailpod11-cph3.one.com | 104.37.34.231 | mx2.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx3.pub.mailpod11-cph3.one.com | 104.37.34.232 | mx3.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx4.pub.mailpod11-cph3.one.com | 104.37.34.233 | mx4.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 77.111.240.137 |
| 🔶 Autoconfig | 77.111.240.137 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a02:2350:5:102:4d:e4c5:5fb:34a5 | 3600s | — | AS51468 | One.com A/S | 2a02:2350:0:0:0:0:0:0/32 | 🇩🇰 Denmark | Copenhagen |
| www | 77.111.240.144 2a02:2350:5:102:81:65e6:4630:dfcb (AS51468) (address records, no CNAME) |
| www vs bare domain | Same network skybooks.dk: 77.111.240.144 2a02:2350:5:102:81:65e6:4630:dfcb (AS51468) www.skybooks.dk: 77.111.240.144 2a02:2350:5:102:81:65e6:4630:dfcb (AS51468) |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 00E55642F312E05CDB899B1433EDF47F… |
| SMTP _25._tcp.mx2.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 00E55642F312E05CDB899B1433EDF47F… |
| SMTP _25._tcp.mx3.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 00E55642F312E05CDB899B1433EDF47F… |
| SMTP _25._tcp.mx4.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 00E55642F312E05CDB899B1433EDF47F… |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2026051205 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | ONE.COM A/S |
| Registered | 2011-06-10 |
| Expires | 2027-06-30 (254d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 13:07:22 | 816ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-25 21:48:25 | 754ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-24 21:41:53 | 715ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-09-21 08:54:39 | 666ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-09-11 00:02:17 | 1003ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-09-01 16:04:11 | 1323ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-08-26 00:35:20 | 823ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-08-12 13:50:24 | 7026ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-07-12 11:47:24 | 868ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-06-26 15:16:35 shown | 584ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-06-22 13:06:48 | 1115ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-18 02:26:07 | 851ms | 2 NS 1 A 4 MX | 🔓 Insecure |