DNS Record Lookup
Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain
Hosting & Network
fsit.cz runs on AS21430, with email configured.
- Hosting network
- AS21430AS21430
- Managed DNS
- Self-hosted / other
- Configured
- IPv6 (AAAA)
- Not enabled
- CAA pinning
- None
Sits alongside 81 other sites on AS21430. Stable here since we started watching (Jul 20, 2026).
The apex and www are the same hosting — the apex via A records.
DNS Records for fsit.cz
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| fsit.cz | MX | 0 | 10 | dmz1.fsit.cz |
| fsit.cz | NS | 0 | ns2.web4u.cz | |
| fsit.cz | NS | 0 | ns.web4u.cz | |
| fsit.cz | A | 0 | 80.250.17.122 | |
| fsit.cz | SOA | 14400 | ns.web4u.cz admin.web4u.cz 2025111200 10800 3600 1209600 14400 | |
| fsit.cz | TXT | 0 | v=spf1 mx a ip4:80.250.17.115 ip4:80.250.17.118 ip4:80.250.17.121 ip4:80.250.29.3 -all | |
| www.fsit.cz | A | 0 | 80.250.17.122 |
What's up with DNS →
Our daily roundup of the most interesting DNS changes across the web — hosting and CDN migrations, network moves, and security-config shifts.
Ask about fsit.cz
BetaAnswers use the live DNS records shown on this page. AI-generated — double-check anything important.
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