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Hosting & Network
chen.cz runs on AS35613, with email configured.
- Hosting network
- AS35613AS35613
- Managed DNS
- Self-hosted / other
- Configured
- IPv6 (AAAA)
- Not enabled
- CAA pinning
- Set
Sits alongside 21 other sites on AS35613. Stable here since we started watching (Jul 20, 2026).
The apex and www are the same hosting — the apex via A records, www via a CNAME to chen.cz.
DNS Records for chen.cz
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| chen.cz | A | 0 | 176.74.143.234 | |
| chen.cz | CAA | 0 | 0 issue letsencrypt.org | |
| chen.cz | CAA | 0 | 0 iodef mailto:security@argalas.net | |
| chen.cz | CAA | 0 | 0 issuewild ; | |
| chen.cz | TXT | 0 | v=spf1 mx ip4:176.74.143.232 ip4:176.74.143.234 ip4:95.129.102.198 include:sparkpostmail.com ~all | |
| chen.cz | MX | 0 | 5 | irian.argalas.net |
| chen.cz | MX | 0 | 20 | fmx2.argalas.net |
| chen.cz | MX | 0 | 1 | fmx1.argalas.net |
| chen.cz | MX | 0 | 15 | liza.argalas.net |
| chen.cz | NS | 0 | liza.argalas.net | |
| chen.cz | NS | 0 | irian.argalas.net | |
| chen.cz | SOA | 10800 | irian.argalas.net dnsadmin.argalas.net 1784629324 7200 7200 2419200 10800 | |
| www.chen.cz | SOA | 10800 | irian.argalas.net dnsadmin.argalas.net 1784629324 7200 7200 2419200 10800 | |
| www.chen.cz | CAA | 0 | 0 issuewild ; | |
| www.chen.cz | CAA | 0 | 0 iodef mailto:security@argalas.net | |
| www.chen.cz | CAA | 0 | 0 issue letsencrypt.org | |
| www.chen.cz | MX | 0 | 15 | liza.argalas.net |
| www.chen.cz | MX | 0 | 5 | irian.argalas.net |
| www.chen.cz | MX | 0 | 1 | fmx1.argalas.net |
| www.chen.cz | MX | 0 | 20 | fmx2.argalas.net |
| www.chen.cz | CNAME | 0 | chen.cz | |
| www.chen.cz | A | 0 | 176.74.143.234 | |
| www.chen.cz | TXT | 0 | v=spf1 mx ip4:176.74.143.232 ip4:176.74.143.234 ip4:95.129.102.198 include:sparkpostmail.com ~all | |
| www.chen.cz | NS | 0 | irian.argalas.net | |
| www.chen.cz | NS | 0 | liza.argalas.net |
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Uptime
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DNS changes
We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
TLS certificate
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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