DNS Record Lookup
Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain
Hosting & Network
firstit.cz runs on AS49101, with email via Microsoft 365.
- Hosting network
- AS49101AS49101
- Managed DNS
- Self-hosted / other
- Microsoft 365
- IPv6 (AAAA)
- Not enabled
- CAA pinning
- Set
Sits alongside 902 other sites on AS49101. Stable here since we started watching (Sep 20, 2026).
The apex and www are the same hosting — the apex via A records.
DNS Records for firstit.cz
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| firstit.cz | TXT | 0 | v=spf1 a mx a:firstit.cz ip4:46.36.41.251 ip4:172.160.248.162 include:spf.protection.outlook.com -all | |
| firstit.cz | TXT | 0 | google-site-verification=lD2ndQv4Nvdj4zJSZ0xqXmDWWLZL36ghO5Ls3Rx1Ppk | |
| firstit.cz | NS | 0 | ns.wedos.cz | |
| firstit.cz | NS | 0 | ns.firstit.cz | |
| firstit.cz | SOA | 3600 | ns.firstit.cz karlovsky.firstit.cz 2026082401 3600 600 1209600 3600 | |
| firstit.cz | MX | 0 | firstit-cz.mail.protection.outlook.com | |
| firstit.cz | CAA | 0 | 0 issuewild letsencrypt.org | |
| firstit.cz | A | 0 | 46.36.41.251 | |
| www.firstit.cz | A | 0 | 46.36.41.251 |
Get alerted the moment firstit.cz's DNS changes
This page is today's snapshot. Turn on monitoring and we'll watch firstit.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, 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
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