4net.cz - robtex.com
4net.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 81.0.235.236🇨🇿 CASABLANCA-AS81.0.232.0/21 Casablanca INT | ||||||
| PTR | dns.gns.cz | ||||||
| NS | 4net.cz ⭐ | ||||||
| A | 81.0.235.236🇨🇿 CASABLANCA-AS81.0.232.0/21 Casablanca INT | ||||||
| PTR | dns.gns.cz | ||||||
| NS | dns.gns.cz | ||||||
| A | 81.0.235.236🇨🇿 CASABLANCA-AS81.0.232.0/21 Casablanca INT | ||||||
| PTR | dns.gns.cz | ||||||
| NS | dns2.gns.cz | ||||||
| A | 78.44.189.154🇨🇿 VODAFONE-CZ-AS78.44.0.0/16 Vodafone Czech Republic a.s. | ||||||
| PTR | ip-78-44-189-154.bb.vodafone.cz | ||||||
| MX | vip.4net.cz ⭐ | ||||||
| A | 81.0.235.140🇨🇿 CASABLANCA-AS81.0.232.0/21 Casablanca INT | ||||||
| PTR | vip.4net.cz | ||||||
| TXT | v=spf1 a mx ip4:81.0.235.236 ip4:81.0.235.140 ~all | ||||||
| SOA | 4net.czhostmaster@gns.cz serial=13 | ||||||
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=1771291036 | ||||||
NS for
4net.cz |
Subdomains
Same first word
Similar names
DNS History
5 records (5 active, 0 former)
●NS4net.cz2015-08-08 → 2026-03-20 · 2 obs
● 2026-03-20 21:35:04
●MXvip.4net.cz2015-08-08 → 2026-03-20 · 2 obs
● 2026-03-20 21:35:04
●A81.0.235.2362015-08-08 → 2026-03-20 · 2 obs
● 2026-03-20 21:35:04
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, d.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz | - |
| 4net.cz | dns.gns.cz, dns2.gns.cz | 2 records |
✅ Authoritative Response
Server: 81.0.235.236
NS records: dns.gns.cz, dns2.gns.cz
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 4net.cz (unsigned zone)
⏱️ Timing
Total: 3815ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.0.235.236 |
| NS | 2 | dns.gns.cz, dns2.gns.cz |
| MX | 1 | vip.4net.cz (pri: 10) |
| TXT | 1 | v=spf1 a mx ip4:81.0.235.236 ip4:81.0.23 |
| SOA | 1 | 4net.cz hostmaster.gns.cz |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (dns.gns.cz, dns2.gns.cz)
Analysis
Hierarchy
4net.cz is the parent of www.4net.cz and vip.4net.cz.
Name Server Role
4net.cz serves as the name server for 4net.cz.
dns2.gns.cz and dns.gns.cz are commonly used as name servers together with 4net.cz.
IP Addresses
4net.cz resolves to a single IP: 81.0.235.236.
Other host names, for instance udcg.cz, web.gns.cz, hostmaster.gns.cz, dns.gns.cz and mail2.gns.cz share IP numbers with 4net.cz.
Name Servers
4net.cz is delegated to three name servers: 4net.cz, dns2.gns.cz and dns.gns.cz.
4net.cz shares some name servers with other domains, for example korunka.org, viit.cz, akfischer.cz, dobromil.cz and trimedar.cz.
These name servers are commonly used with the name servers coerver.cz.
Host names with a single IP:
4net.cz points to 81.0.235.236.
dns2.gns.cz points to 78.44.189.154.
dns.gns.cz points to 81.0.235.236.
Host names that point to 81.0.235.236: 4net.cz and dns.gns.cz.
Mail Servers
4net.cz is handled by a single mail server, vip.4net.cz.
4net.cz uses the same mail server setup as other domains, for example maxdrinks.cz.
4net.cz shares at least some mail servers with other domains, for example akfischer.cz.
these mail servers are commonly used alongside the mail servers mail.gns.cz.
Host name vip.4net.cz points to IP 81.0.235.140.