tutorial.cz - robtex.com
tutorial.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 87.236.195.92🇨🇿 COOLHOUSING-AS87.236.194.0/23 Network of Coolhousing | ||||||
| PTR | ns1.gradex.cz | ||||||
| NS | tutorial.cz ⭐ | ||||||
| A | 87.236.195.92🇨🇿 COOLHOUSING-AS87.236.194.0/23 Network of Coolhousing | ||||||
| PTR | ns1.gradex.cz | ||||||
| NS | ns1.gradex.cz | ||||||
| A | 87.236.195.92🇨🇿 COOLHOUSING-AS87.236.194.0/23 Network of Coolhousing | ||||||
| PTR | ns1.gradex.cz | ||||||
| NS | ns2.gradex.cz | ||||||
| A | 87.236.195.92🇨🇿 COOLHOUSING-AS87.236.194.0/23 Network of Coolhousing | ||||||
| PTR | ns1.gradex.cz | ||||||
| MX | mail.gradex.cz ⭐ | ||||||
| A | 87.236.195.93🇨🇿 COOLHOUSING-AS87.236.194.0/23 Network of Coolhousing | ||||||
| PTR | mail.gradex.com | ||||||
| SOA | tutorial.czradim@gradex.cz 2003-08-21 #0 | ||||||
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=1778375834 | ||||||
NS for
tutorial.cz |
Same first word
Similar names
DNS History
6 records (5 active, 1 former)
●NStutorial.cz2015-08-20 → 2026-05-10 · 2 obs
● 2026-05-10 01:39:08
○A217.11.249.262015-08-20 → 2017-08-16 · 4 obs
● 2017-08-16 18:58:00
○ 2026-02-19 01:53:04
○ 2026-05-10 01:39:08
●A87.236.195.922026-02-19 → 2026-05-10 · 3 obs
● 2026-02-19 01:53:04
● 2026-05-10 01:39:08
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | b.ns.nic.cz, d.ns.nic.cz, a.ns.nic.cz, c.ns.nic.cz | - |
| tutorial.cz | ns1.gradex.cz, ns2.gradex.cz | 2 records |
✅ Authoritative Response
Server:87.236.195.92
NS records: ns1.gradex.cz, ns2.gradex.cz
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for tutorial.cz (unsigned zone)
⏱️ Timing
Total: 1235ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 87.236.195.92 |
| NS | 2 | ns1.gradex.cz, ns2.gradex.cz |
| MX | 1 | mail.gradex.cz (pri: 10) |
| SOA | 1 | tutorial.cz radim.gradex.cz |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns1.gradex.cz, ns2.gradex.cz)
Analysis
Name Server Role
tutorial.cz serves as a name server for tutorial.cz.
ns1.gradex.cz and ns2.gradex.cz are commonly used as name servers together with tutorial.cz.
IP Addresses
tutorial.cz points to an IP address: 87.236.195.92.
other host names include santisinvest.cz, cypherpunk.cz, indate.com, narexzdice.cz and tuni.cz; they share IP numbers with tutorial.cz.
Name Servers
tutorial.cz is delegated to three name servers: tutorial.cz, ns1.gradex.cz and ns2.gradex.cz.
tutorial.cz at least partially shares name servers with other domains, for instance cabopino.info, hotelcentrum.cz, cashnote.eu, santisinvest.cz and cypherpunk.cz.
These name servers are commonly used with hotelolomouc.cz and vhodnydarek.cz.
Host names with a single IP:
tutorial.cz, ns1.gradex.cz and ns2.gradex.cz point to 87.236.195.92.
Mail Servers
tutorial.cz is handled by a single mail server, mail.gradex.cz.
tutorial.cz uses the same mail server setup as other domains, for instance cabopino.info, cashnote.eu, tuni.cz, tonerpro.cz and revize.net.
The host name mail.gradex.cz points to IP 87.236.195.93.