rastplus.cz - robtex.com
rastplus.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 81.91.85.135🇨🇿 WEB4U81.91.80.0/21 | ||||||
| PTR | web.cybers.cz | ||||||
| NS | ns1.cyberhost.cz ⭐ | ||||||
| A | 81.91.85.93🇨🇿 WEB4U81.91.80.0/21 | ||||||
| PTR | mail.cybers.cz | ||||||
| NS | ns2.cyberhost.cz | ||||||
| A | 81.91.85.252🇨🇿 WEB4U81.91.80.0/21 | ||||||
| PTR | ns2.cybers.cz | ||||||
| MX | mail.rastplus.cz ⭐ | ||||||
| A | 81.91.85.93🇨🇿 WEB4U81.91.80.0/21 | ||||||
| PTR | mail.cybers.cz | ||||||
| TXT | v=spf1 mx a ip4:81.91.81.218 ip4:81.91.85.229 ip4:81.91.85.94 -all | ||||||
| SOA | ns1.cyberhost.czadmin@web4u.cz serial=2608171243 | ||||||
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=1786961862 | ||||||
Subdomains
Same first word
rastplus.cz |
Similar names
DNS History
4 records (4 active, 0 former)
●NSns1.cyberhost.cz2026-05-20 → 2026-08-17 · 2 obs
● 2026-08-17 10:46:56
●NSns2.cyberhost.cz2026-05-20 → 2026-08-17 · 2 obs
● 2026-08-17 10:46:56
●MXmail.rastplus.cz2026-05-20 → 2026-08-17 · 2 obs
● 2026-08-17 10:46:56
●A81.91.85.1352026-05-20 → 2026-08-17 · 2 obs
● 2026-08-17 10:46:56
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| rastplus.cz | ns1.cyberhost.cz, ns2.cyberhost.cz | 2 records |
✅ Authoritative Response
Server:81.91.85.93
NS records: ns1.cyberhost.cz, ns2.cyberhost.cz
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for rastplus.cz (unsigned zone)
⏱️ Timing
Total: 823ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.91.85.135 |
| NS | 2 | ns2.cyberhost.cz, ns1.cyberhost.cz |
| MX | 1 | mail.rastplus.cz (pri: 10) |
| TXT | 1 | v=spf1 mx a ip4:81.91.81.218 ip4:81.91.8 |
| SOA | 1 | ns1.cyberhost.cz admin.web4u.cz |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns2.cyberhost.cz, ns1.cyberhost.cz)
Analysis
Hierarchy
rastplus.cz is the parent domain of ww.rastplus.cz and mail.rastplus.cz.
IP Addresses
rastplus.cz points to a single IP number: 81.91.85.135.
Additional host names — mx1.tatam.eu, mx1.superlogo.cz, vanatka.cz and two others — share IP numbers with rastplus.cz.
Name Servers
Two name servers handle the delegation for rastplus.cz: ns1.cyberhost.cz and ns2.cyberhost.cz.
rastplus.cz shares its name server setup with other domains, including darkac.cz, liptak.cz, preklady-hrochova.cz and two others.
rastplus.cz has some name servers in common with other domains such as paveltoman.info, solator.cz and letterhead.cz
These name servers are frequently seen alongside the name servers ns3.cyberhost.cz.
ns1.cyberhost.cz and ns2.cyberhost.cz each resolve to one IP number: ns1.cyberhost.cz points to 81.91.85.93 and ns2.cyberhost.cz points to 81.91.85.252.
Mail Servers
rastplus.cz has one mail server: mail.rastplus.cz.
mail.rastplus.cz carries a single IP number, which is 81.91.85.93.