worldmathbook.dk is a .dk domain served by 2 nameservers (ns1.houseof-seo.dk, ns2.houseof-seo.dk). It was registered on 27 March 2024 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.41.114 is hosted by team.blue Denmark A/S (AS48854) in Denmark. 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 |
|---|---|---|---|---|---|---|---|
| 185.21.41.114 | — | linux22.curanet.dk | AS48854 | team.blue Denmark A/S | 185.21.40.0/22 | 🇩🇰 Denmark | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 185.21.41.114 |
| 🔶 Autoconfig | 185.21.41.114 |
| www | 185.21.41.114 (AS48854) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026060301 |
| Primary NS (MNAME) | ns1.houseof-seo.dk |
| Responsible (RNAME) | hostmaster@curanet.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2024-03-27 |
| Expires | 2027-03-26 (159d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-03 03:41:27 | 385ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-24 22:26:06 | 390ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-27 09:28:53 | 675ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-17 21:40:06 shown | 5689ms | 2 NS 1 A 0 MX | 🔒 Secure |