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Hosting & Network
instruktori.cz runs on AS39790, with email via Google Workspace.
- Hosting network
- AS39790AS39790
- Managed DNS
- Self-hosted / other
- Google Workspace
- IPv6 (AAAA)
- Enabled
- CAA pinning
- None
Sits alongside 1,122 other sites on AS39790. Stable here since we started watching (Aug 9, 2026).
The apex and www are the same hosting — the apex via A records, www via a CNAME to kokos.instruktori.cz.
DNS Records for instruktori.cz
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| instruktori.cz | MX | 0 | 1 | aspmx.l.google.com |
| instruktori.cz | MX | 0 | 10 | alt3.aspmx.l.google.com |
| instruktori.cz | MX | 0 | 5 | alt1.aspmx.l.google.com |
| instruktori.cz | MX | 0 | 10 | alt4.aspmx.l.google.com |
| instruktori.cz | MX | 0 | 5 | alt2.aspmx.l.google.com |
| instruktori.cz | AAAA | 0 | 2001:1568:f::1247 | |
| instruktori.cz | A | 0 | 81.91.92.134 | |
| instruktori.cz | TXT | 0 | facebook-domain-verification=jowx3nzb2x2pmi7de8f8su9s8y0bao | |
| instruktori.cz | TXT | 0 | v=spf1 include:_spf.mlsend.com a:kokos.instruktori.cz include:_spf.google.com ~all | |
| instruktori.cz | TXT | 0 | google-site-verification=2vY38ulm0g1Lv7cl7b2PlKIemOd4MSTU7fbrpyPeZxQ | |
| instruktori.cz | NS | 0 | ns.forpsi.cz | |
| instruktori.cz | NS | 0 | ns.forpsi.net | |
| instruktori.cz | NS | 0 | ns.forpsi.it | |
| instruktori.cz | SOA | 3600 | ns.forpsi.net admin.forpsi.com 2026080301 14400 3600 2592000 3600 | |
| www.instruktori.cz | A | 0 | 81.91.92.134 | |
| www.instruktori.cz | AAAA | 0 | 2001:1568:f::1247 | |
| www.instruktori.cz | TXT | 0 | v=spf1 a ~all | |
| www.instruktori.cz | CNAME | 0 | kokos.instruktori.cz |
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About DNS Records
DNS (Domain Name System) records are instructions that provide information about a domain, including its IP addresses, mail servers, and other services. Common record types include:
- SOA (Start of Authority) - Contains administrative information about the zone
- NS (Nameserver) - Specifies authoritative nameservers for the domain
- A (Address) - Maps a domain to an IPv4 address
- AAAA - Maps a domain to an IPv6 address
- CNAME (Canonical Name) - Creates an alias pointing to another domain
- MX (Mail Exchange) - Specifies mail servers for the domain