DNS Record Lookup
Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain
Hosting & Network
szdc.cz runs on AS25512, with email configured.
- Hosting network
- AS25512AS25512
- Managed DNS
- Self-hosted / other
- Configured
- IPv6 (AAAA)
- Not enabled
- CAA pinning
- None
Sits alongside 412 other sites on AS25512. Stable here since we started watching (Aug 4, 2026).
The apex and www are the same hosting — the apex via A records.
DNS Records for szdc.cz
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| szdc.cz | TXT | 0 | cisco-ci-domain-verification=64e32429594a568a3c545d2f8495d6898e15b2b164c2f9462d609414e4ffa36e | |
| szdc.cz | TXT | 0 | MS=2CDEAFF242A225617068A0B9AEE2EFAD606B6384 | |
| szdc.cz | TXT | 0 | v=spf1 mx ip4:81.19.46.20/32 ip4:81.19.46.25/32 ip4:81.19.46.4/32 ip4:82.117.128.29/32 -all | |
| szdc.cz | TXT | 0 | MS=ms35403722 | |
| szdc.cz | TXT | 0 | EIOTIuhkjfds841EAO68asdad | |
| szdc.cz | MX | 0 | 20 | sis0000phaux801.ecps.cz |
| szdc.cz | MX | 0 | 10 | sis0000phaux821.ecps.cz |
| szdc.cz | SOA | 14400 | sis0000phant800.insd.cz hostmaster.insd.cz 2016033565 3600 900 604800 14400 | |
| szdc.cz | A | 0 | 82.202.100.51 | |
| szdc.cz | NS | 0 | sis0000phant800.insd.cz | |
| szdc.cz | NS | 0 | sis0000phant802.insd.cz | |
| szdc.cz | NS | 0 | sis0000phant804.insd.cz | |
| www.szdc.cz | A | 0 | 82.202.100.51 |
Get alerted the moment szdc.cz's DNS changes
This page is today's snapshot. Turn on monitoring and we'll watch szdc.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