d339.server4u.cz - robtex.com
d339.server4u.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 81.91.85.37🇨🇿 WEB4U81.91.80.0/21 | ||||||
| PTR | z200.server4u.cz | ||||||
server4u.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 81.91.86.27🇨🇿 WEB4U81.91.80.0/21 | ||||||
| NS | ns2.web4u.cz ⭐ | ||||||
| NS | ns.web4u.cz | ||||||
| MX | mx1.mailchannels.net ⭐ | ||||||
| MX | mx2.mailchannels.net ⭐ | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2026-05-05 #2 | ||||||
Same first word
Similar names
DNS History
1 record (1 active, 0 former)
●A81.91.85.372026-05-11 → 2026-05-11 · 2 obs
● 2026-05-11 12:22:12
● 2026-05-11 22:16:56
● 2026-05-11 22:16:56
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | d.ns.nic.cz, b.ns.nic.cz, a.ns.nic.cz, c.ns.nic.cz | - |
| server4u.cz | ns.web4u.cz, ns2.web4u.cz | 4 records |
✅ Authoritative Response
Server:185.14.224.241
NS records: ns.web4u.cz, ns2.web4u.cz
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1678ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.91.85.37 |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns.web4u.cz, ns.web4u.cz, ns2.web4u.cz...)
Analysis
IP Addresses
d339.server4u.cz points to a single IP number: 81.91.85.37.
other host names for instance motorent.cz, autostav-mix.cz, www.akcia-electrolux.sk, cgmail.cz and www.coffeeheaven.cz share IP numbers with d339.server4u.cz.