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Hosting & Network
ctu.cz runs on AS206548, with email via Microsoft 365.
- Hosting network
- AS206548AS206548
- Managed DNS
- Self-hosted / other
- Microsoft 365
- IPv6 (AAAA)
- Enabled
- CAA pinning
- None
Sits alongside 491 other sites on AS206548. Stable here since we started watching (Oct 28, 2026).
The apex and www are the same hosting — the apex via A records.
DNS Records for ctu.cz
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| ctu.cz | A | 0 | 185.178.175.96 | |
| ctu.cz | MX | 0 | 10 | ctu-cz.j-v1.mx.microsoft |
| ctu.cz | SOA | 2560 | ns1.websupport.cz admin.websupport.cz 1790157990 7200 2048 1048576 2560 | |
| ctu.cz | NS | 0 | ns2.websupport.cz | |
| ctu.cz | NS | 0 | ns3.websupport.eu | |
| ctu.cz | NS | 0 | ns1.websupport.cz | |
| ctu.cz | TXT | 0 | 4T2E2zHVcWzPhia6XspSopO0GRxbNjqiJW4qq1mVneo+7QOwYv3BBjYJSzY5v5baoSCMH2uBS9J8K1OlEnEH2Q== | |
| ctu.cz | TXT | 0 | atlassian-domain-verification=hmUGhJUq8dWiKFa1lg7Ht19g6q3w8MKI2arBUGW6TQpGZj5GC37znNBJhFiccPQk | |
| ctu.cz | TXT | 0 | v=spf1 a:mail.ctu.cz ip4:185.68.212.150 ip4:185.68.212.2 ip4:185.178.175.96 ip4:185.68.212.36 ip4:185.68.212.37 ip6:2a05:1c40:0:1:B9:44:D4:24 ip6:2a05:1c40:0:1:B9:44:D4:25 ip6:2a05:1c41::B9:44:D4:96 ip6:2a0a:6580:11::b9b2:af60 include:spf.protection.outlook.com ~all | |
| ctu.cz | TXT | 0 | atlassian-domain-verification=CneZP2LSajg2knNQeLHkHohEZYpvyNa9eKREZYlizeMh4PIGoz8xh47D2av0asPW | |
| ctu.cz | TXT | 0 | MS=ms40263169 | |
| ctu.cz | AAAA | 0 | 2a0a:6580:11::b9b2:af60 | |
| www.ctu.cz | AAAA | 0 | 2a0a:6580:11::b9b2:af60 | |
| www.ctu.cz | A | 0 | 185.178.175.96 |
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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