DNS Record Lookup
Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain
Hosting & Network
master.cz runs on AS24971, with email configured.
- Hosting network
- AS24971AS24971
- Managed DNS
- Self-hosted / other
- Configured
- IPv6 (AAAA)
- Enabled
- CAA pinning
- Set
Sits alongside 20,276 other sites on AS24971. Stable here since we started watching (Aug 7, 2026).
The apex and www are the same hosting — the apex via A records.
DNS Records for master.cz
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| master.cz | MX | 0 | 25 | ns3.master.cz |
| master.cz | MX | 0 | 10 | mail.master.cz |
| master.cz | CAA | 0 | 0 issue letsencrypt.org | |
| master.cz | CAA | 0 | 0 issue digicert.com | |
| master.cz | CAA | 0 | 0 iodef mailto:support@master.cz | |
| master.cz | CAA | 0 | 0 issue certum.pl | |
| master.cz | NS | 0 | ns1.master.cz | |
| master.cz | NS | 0 | ns3.master.cz | |
| master.cz | NS | 0 | ns2.master.cz | |
| master.cz | A | 0 | 80.79.16.235 | |
| master.cz | SOA | 300 | ns1.master.cz noc.master.cz 2026082151 900 900 1800 300 | |
| master.cz | TXT | 0 | 272e638e51f8544cf26ea584d68328a7f37365f2fdaac8e64509e0985135049 | |
| master.cz | TXT | 0 | MS=07A1C78FD7087B45AA9D90A4F11B567B29AC9E9D | |
| master.cz | TXT | 0 | ahrefs-site-verification_883274841276f4db6957d3bf1dff5ccbf7aa74c716af02625ba5158800538037 | |
| master.cz | TXT | 0 | v=spf1 mx ip6:2a01:430:100:5c::2 a:d24.westmaster.com ip4:185.58.41.176 ip4:77.93.193.48 a:cis.masterdc.com a:d4023.masterinter.net a:cloud-2123.masterinter.net ip4:81.31.45.148 ip4:185.58.42.235 ip4:89.185.237.62 include:spf.protection.outlook.com a:mailing.master.cz ~all | |
| master.cz | TXT | 0 | brevo-code:f376c48802e5709dff3593087c019f90 | |
| master.cz | TXT | 0 | google-site-verification=uWFno1EFZ2n7A5IXU2WuIdPFXjf8_gljzFe1RRnIDKY | |
| master.cz | AAAA | 0 | 2a01:430:100:2b::5 | |
| www.master.cz | A | 0 | 80.79.16.235 | |
| www.master.cz | AAAA | 0 | 2a01:430:100:2b::5 |
Get alerted the moment master.cz's DNS changes
This page is today's snapshot. Turn on monitoring and we'll watch master.cz continuously, notifying you the moment anything moves across all three signals:
Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
DNS changes
We watch NS, MX, CAA, CNAME, TXT 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
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
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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