opencast.dk is a .dk domain served by 3 nameservers (ns.vas-hosting.com, ns.vas-hosting.cz, ns.vas-hosting.eu). It was registered on 26 March 2025 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 37.235.104.41 is hosted by SH.cz s.r.o. (AS39392) in Czechia. Mail is handled by mail.vas-hosting.cz. 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 |
|---|---|---|---|---|---|---|---|
| 37.235.104.41 | 1800s | sse04.vas-server.cz | AS39392 | SH.cz s.r.o. | 37.235.96.0/20 | 🇨🇿 Czechia | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 1800s | mail.vas-hosting.cz | 95.168.205.159 95.168.205.159 |
159.128-26.205.168.95.in-addr.arpa mail.vas-hosting.cz |
AS39392 SH.cz s.r.o. AS39392 SH.cz s.r.o. |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | mail.vas-hosting.cz → 95.168.205.159 |
| 🔶 Autoconfig | mail.vas-hosting.cz → 95.168.205.159 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 10 | 1 | 443 | mail.vas-hosting.cz |
| TXT Record |
|---|
| v=spf1 a mx ?all |
| Policy | Record (opencast.dk) |
|---|---|
| ?all (neutral) | v=spf1 a mx ?all |
| www CNAME | opencast.dk (all on opencast.dk) → 37.235.104.41 (AS39392) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| default | — | RSA · ~1024 bit below 2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
DNS lookups: 2/10 · policy: ?all
| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.opencast.dk | opencast.dk |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mail.vas-hosting.cz | DANE-EE · SPKI · SHA-256 | FF57A85B97177D89104F0D42108A5F40… |
| SMTP _25._tcp.mail.vas-hosting.cz | DANE-EE · SPKI · SHA-512 | 3204AF143268A8C0CE04FB45BE8E8136… |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2503271105 |
| Primary NS (MNAME) | ns.vas-hosting.cz |
| Responsible (RNAME) | info@vas-hosting.cz |
| Refresh | 28800s |
| Retry | 600s |
| Expire | 2419200s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Gransy s.r.o. |
| Registered | 2025-03-26 |
| Expires | 2027-03-25 (158d) |
Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 13:56:58 | 1665ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-28 15:34:35 shown | 2111ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-26 15:07:27 | 10257ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-16 05:33:52 | 11994ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-05 22:51:18 | 1925ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-27 20:05:07 | 2972ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 18:32:22 | 9892ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 17:00:36 | 2765ms | 3 NS 1 A 1 MX | 🔓 Insecure |