u4.cz - robtex.com
u4.cz
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=1783453640 | ||||||
Same first word
u4.ink |
u4.co.nz |
u4.nl |
u4.de |
u4.gmbh |
u4.ca |
u4.org.ph |
u4.fr |
u4.cn |
u4.no |
u4.org |
u4.co.uk |
u4.tv |
u4.pl |
u4.cz |
u4.com |
u4.lt |
u4.at |
u4.hu |
u4.net |
u4.ru |
u4.biz |
u4.eu |
u4.be |
u4.su |
Similar names
DNS History
6 records (6 active, 0 former)
●A81.0.234.822015-07-04 → 2026-07-07 · 2 obs
● 2026-07-07 20:04:54
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| u4.cz | ns.wedos.cz, ns.wedos.eu, ns.wedos.com, ns.wedos.net | 4 records |
✅ Authoritative Response
Server:45.138.106.1
NS records: ns.wedos.cz, ns.wedos.eu, ns.wedos.com, ns.wedos.net
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 2194ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.0.234.82 |
| NS | 4 | ns.wedos.com, ns.wedos.net... |
| MX | 1 | mxredir.wedos.net (pri: 1) |
| SOA | 1 | ns.wedos.net wedos.wedos.com |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns.wedos.cz, ns.wedos.cz, ns.wedos.cz...)
Analysis
IP Addresses
u4.cz points to a single IP number: 81.0.234.82.
Additional host names — 789.cz, pandanet.cz, vinecko.eu and two others — share IP numbers with u4.cz.
Name Servers
u4.cz has four authoritative name servers: ns.wedos.com, ns.wedos.cz, ns.wedos.eu and ns.wedos.net.
u4.cz partially shares its NS delegation with several other domains, including snyt-primka.cz, n3b.cz, vtestu.cz and two others.
Host names resolving to four IP addresses:
ns.wedos.cz maps to the following IP addresses: 45.138.106.1, 185.8.238.1, 2a0e:acc0:1::caff:caff:cafb and 2a0e:acc0:2::c:1:c1.
ns.wedos.net maps to the following IP addresses: 75.2.92.86, 99.83.142.9, 2600:9000:a419:5a54:19f7:a614:36fd:2825 and 2600:9000:a705:25bb:c632:5e5a:dd9c:1e46.
Host names with two IP numbers:
ns.wedos.com directs traffic to 45.138.106.0 and 2a0e:acc0:1::cafe:cafe:cafe.
ns.wedos.eu directs traffic to 185.8.238.0 and 2a0e:acc0:2::b:1:b1.
Mail Servers
u4.cz has one mail server: mxredir.wedos.net.
u4.cz shares the same mail server setup as other domains, including s-ss.cz, zapsi.cz, x3.sk and two others.
At least a portion of u4.cz's mail servers are also used by other domains, for example koehler.cz.
These mail servers are frequently seen alongside the mail servers mail.koehler.cz.
The host mxredir.wedos.net resolves to 46.28.105.5 and 2a02:2b88:1:4::18 — two IP addresses.