test0.cz - robtex.com
test0.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 84.242.86.198🇨🇿 VODAFONE-CZ-AS84.242.64.0/19 Vodafone Czech Republic a.s. | ||||||
| PTR | static-84-242-86-198.bb.vodafone.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 | mx.redcat.cz ⭐ | ||||||
| A | 2001:1568::7061🇨🇿 WEB4U2001:1568::/33 | ||||||
| PTR | mx.redcat.cz | ||||||
| A | 81.91.87.61🇨🇿 WEB4U81.91.80.0/21 | ||||||
| PTR | mx.redcat.cz | ||||||
| TXT | v=spf1 include:_spf.redcat.cz ~all | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2023-06-22 #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=1781025435 | ||||||
Subdomains
mail.test0.cz |
Same first word
Similar names
DNS History
4 records (4 active, 0 former)
●A84.242.86.1982026-05-15 → 2026-06-09 · 2 obs
● 2026-06-09 18:01:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| test0.cz | ns2.web4u.cz, ns.web4u.cz | 4 records |
✅ Authoritative Response
Server:85.207.53.12
NS records: ns2.web4u.cz, ns.web4u.cz
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1297ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 84.242.86.198 |
| NS | 2 | ns.web4u.cz, ns2.web4u.cz |
| MX | 1 | mx.redcat.cz (pri: 10) |
| TXT | 1 | v=spf1 include:_spf.redcat.cz ~all |
| SOA | 1 | ns.web4u.cz admin.web4u.cz |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns2.web4u.cz, ns.web4u.cz, ns2.web4u.cz...)
Analysis
Hierarchy
test0.cz is the parent zone for mail.test0.cz.
IP Addresses
test0.cz resolves to one IP address: 84.242.86.198.
There are other host names — exchange.q2.cz among them — that share IP numbers with test0.cz.
Name Servers
DNS delegation for test0.cz points to two name servers: ns2.web4u.cz and ns.web4u.cz.
test0.cz uses the same name servers as several other domains — among them interierzone.cz, sensofeet.cz, aquapalacevipclub.cz and two more.
test0.cz has partial name server overlap with other domains, including adlof.cz.
ns2.web4u.cz directs to 85.207.53.12 and 2a02:a40:100:28ff::12. ns.web4u.cz directs to 185.14.224.241 and 2001:1568:fd::241. Each host name carries two IP addresses.
Mail Servers
Mail for test0.cz is handled by a single mail server, mx.redcat.cz.
test0.cz uses an identical mail server configuration to several other domains — among them q2interactive.cz, rezidence-lesopark.cz, balga.cz and two more.
The host mx.redcat.cz resolves to 81.91.87.61 and 2001:1568::7061 — two IP addresses.