rocenka.net - robtex.com
rocenka.net
| DNSSEC | ⚠️ Not signed | ||||||
| A | 81.91.86.11🇨🇿 WEB4U81.91.80.0/21 | ||||||
| PTR | php5.web4u.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.web4u.cz ⭐ | ||||||
| A | 2001:1568::7012🇨🇿 WEB4U2001:1568::/33 | ||||||
| PTR | mx.web4u.cz | ||||||
| A | 81.91.87.12🇨🇿 WEB4U81.91.80.0/21 | ||||||
| PTR | mx.web4u.cz | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2011-05-20 #1 | ||||||
net
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1778460322 | ||||||
Subdomains
mail.rocenka.net |
Same first word
Similar names
DNS History
5 records (4 active, 1 former)
○MXmail.rocenka.net2015-08-16 → 2017-03-30 · 4 obs
● 2017-03-30 14:26:56
○ 2026-03-26 21:23:54
○ 2026-05-11 01:00:08
●MXmx.web4u.cz2026-03-26 → 2026-05-11 · 3 obs
● 2026-03-26 21:23:54
● 2026-05-11 01:00:08
●A81.91.86.112015-08-16 → 2026-05-11 · 2 obs
● 2026-05-11 01:00:08
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | m.gtld-servers.net, k.gtld-servers.net, b.gtld-servers.net, f.gtld-servers.net... | - |
| rocenka.net | ns.web4u.cz, ns2.web4u.cz | - |
✅ Authoritative Response
Server:85.207.53.12
NS records: ns.web4u.cz, ns2.web4u.cz
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for rocenka.net (unsigned zone)
⏱️ Timing
Total: 836ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.91.86.11 |
| NS | 2 | ns.web4u.cz, ns2.web4u.cz |
| MX | 1 | mx.web4u.cz (pri: 10) |
| SOA | 1 | ns.web4u.cz admin.web4u.cz |
Analysis
Hierarchy
The parent of mail.rocenka.net is rocenka.net.
IP Addresses
rocenka.net points to IP number: 81.91.86.11.
Other host names such as unassigned-81-91-86-72.web4u.cz, unassigned-81-91-82-240.web4u.cz, unassigned-81-91-87-56.web4u.cz, www.atelierr.cz and caspr.cz share IPs with rocenka.net.
Name Servers
rocenka.net is delegated to two name servers: ns2.web4u.cz and ns.web4u.cz.
rocenka.net shares the same name server setup as newwinery.com, panelektro.cz, fisporent.com, adsls.cz and memlook.com.
Host names with two IP numbers: ns2.web4u.cz points to: 2a02:a40:100:28ff::12 and 85.207.53.12; ns.web4u.cz points to: 2001:1568:fd::241 and 185.14.224.241.
Mail Servers
rocenka.net is handled by a single mail server, mx.web4u.cz.
The mail server setup for rocenka.net matches that of other domains, for instance matrix-fitness.cz, besrenova.cz, attopen.cz, kajmank.cz and drexiss.com.
rocenka.net shares mail servers with other domains, for instance ingcorporation.cz and pujcovna-lodi.cz.
these mail servers are commonly used together with mx2.web4u.cz.
mx.web4u.cz points to two IPs: 2001:1568::7012 and 81.91.87.12.