linkbiblioteket.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 2 December 2014 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.41.231 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by mx1.onlinemail.io, mx2.onlinemail.io. The zone is not DNSSEC-signed, 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 |
|---|---|---|---|---|---|---|---|
| 185.21.41.231 | — | linux30.curanet.dk | AS48854 | team.blue Denmark A/S | 185.21.40.0/22 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | — | mx1.onlinemail.io | 185.21.42.12 | mx1.onlinemail.io | AS48854 team.blue Denmark A/S |
| 20 | — | mx2.onlinemail.io | 46.36.208.16 | mx2.onlinemail.io | AS48854 team.blue Denmark A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover-mf.onlinemail.io → 185.21.40.62 |
| 🔶 Autoconfig | autoconfig-mf.onlinemail.io → 185.21.40.62 |
| TXT Record |
|---|
| v=spf1 include:spf.onlinemail.io include:spf.curanet.dk -all |
| Policy | Record (linkbiblioteket.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.onlinemail.io include:spf.curanet.dk -all |
| www | 185.21.41.231 (AS48854) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| 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: 6/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2024111404 |
| 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 | 2014-12-02 |
| Expires | 2026-12-31 (68d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-13 02:19:17 | 366ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-07 21:03:25 | 395ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-02 22:17:21 | 755ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-30 22:12:00 | 526ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-30 05:54:52 | 441ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-13 16:41:25 | 560ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-24 04:17:07 | 795ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-18 08:35:55 shown | 681ms | 3 NS 1 A 2 MX | 🔓 Insecure |