studiosara.cz - robtex.com
studiosara.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 81.91.92.78🇨🇿 WEB4U81.91.88.0/21 | ||||||
| PTR | vs971.server4u.cz | ||||||
| NS | ns2.web4u.cz ⭐ | ||||||
| A | 2a02:a40:100:28ff::12🇨🇿 BlueTone-AS2a02:a40::/32 Ceske Radiokomunikace, a.s. | ||||||
| PTR | ns2.web4u.cz | ||||||
| A | 85.207.53.12🇨🇿 BlueTone-AS85.207.0.0/16 BlueTone-CRa-CZ Fourth address block | ||||||
| PTR | ns2.web4u.cz | ||||||
| NS | ns.web4u.cz | ||||||
| A | 2001:1568:fd::241🇨🇿 WEB4U2001:1568::/33 | ||||||
| PTR | ns.web4u.cz | ||||||
| A | 185.14.224.241🇨🇿 WEB4U185.14.224.0/23 | ||||||
| PTR | ns.web4u.cz | ||||||
| MX | mail.studiosara.cz ⭐ | ||||||
| A | 81.91.92.78🇨🇿 WEB4U81.91.88.0/21 | ||||||
| PTR | vs971.server4u.cz | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2009-04-23 #1 | ||||||
cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.ns.nic.cz ⭐ | ||||||
| NS | b.ns.nic.cz | ||||||
| NS | c.ns.nic.cz | ||||||
| NS | d.ns.nic.cz | ||||||
| SOA | a.ns.nic.czhostmaster@nic.cz serial=1774550835 | ||||||
Subdomains
mail.studiosara.cz |
Same first word
studiosara.it |
studiosara.cz |
Similar names
DNS History
5 records (4 active, 1 former)
●MXmail.studiosara.cz2015-05-08 → 2026-03-26 · 2 obs
● 2026-03-26 19:40:22
○A81.91.84.1572015-05-08 → 2016-08-17 · 3 obs
● 2016-08-17 13:05:48
○ 2026-03-26 19:40:22
●A81.91.92.782026-03-26 → 2026-03-26 · 2 obs
● 2026-03-26 19:40:22
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | d.ns.nic.cz, b.ns.nic.cz, a.ns.nic.cz, c.ns.nic.cz | - |
| studiosara.cz | ns.web4u.cz, ns2.web4u.cz | 4 records |
✅ Authoritative Response
Server:85.207.53.12
NS records: ns.web4u.cz, ns2.web4u.cz
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 783ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.91.92.78 |
| NS | 2 | ns.web4u.cz, ns2.web4u.cz |
| MX | 1 | mail.studiosara.cz (pri: 10) |
| SOA | 1 | ns.web4u.cz admin.web4u.cz |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns.web4u.cz, ns.web4u.cz, ns2.web4u.cz...)
Analysis
Hierarchy
The parent of mail.studiosara.cz is studiosara.cz.
IP Addresses
studiosara.cz points to an IP address: 81.91.92.78.
other host names include mail.buresovi.eu, davidmalikarts.com, mail.frankzappa.cz, mail.studiosara.cz and vs971.server4u.cz; they share IP numbers with studiosara.cz.
Name Servers
Two name servers ns2.web4u.cz and ns.web4u.cz handle the delegation for studiosara.cz.
studiosara.cz shares the same name server setup as other domains, for instance m-popelka.cz, svetelektra.com, kajmank.eu, icedress.cz and kalivoda.cz.
Host names with two IP numbers:
ns2.web4u.cz points to 2a02:a40:100:28ff::12 and 85.207.53.12.
ns.web4u.cz points to 2001:1568:fd::241 and 185.14.224.241.
Mail Servers
studiosara.cz is handled by a single mail server, mail.studiosara.cz.
The host name mail.studiosara.cz points to IP 81.91.92.78.